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Finding the Fourth Proportional to 57,158.39, 78,878.91 and 31,665.56

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Solution

The fourth proportional to 57,158.39, 78,878.91 and 31,665.56 is: 43,698.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,158.39 : 78,878.91 = 31,665.56 : x
  2. Step 2: Convert to fraction form
    57,158.39/78,878.91 = 31,665.56/x
  3. Step 3: Cross multiply
    57,158.39x = 78,878.91 × 31,665.56
  4. Step 4: Simplify right side
    57,158.39x = 2,497,744,857.34
  5. Step 5: Solve for x
    x = 2,497,744,857.34/57,158.39
  6. Step 6: Final answer
    x = 43,698.66

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