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Finding the Fourth Proportional to 210,978,850.67, 316,345,605.87 and 79,831,257.28

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Solution

The fourth proportional to 210,978,850.67, 316,345,605.87 and 79,831,257.28 is: 119,700,469.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,978,850.67 : 316,345,605.87 = 79,831,257.28 : x
  2. Step 2: Convert to fraction form
    210,978,850.67/316,345,605.87 = 79,831,257.28/x
  3. Step 3: Cross multiply
    210,978,850.67x = 316,345,605.87 × 79,831,257.28
  4. Step 4: Simplify right side
    210,978,850.67x = 25,254,267,451,605,448
  5. Step 5: Solve for x
    x = 25,254,267,451,605,448/210,978,850.67
  6. Step 6: Final answer
    x = 119,700,469.37

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