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Finding the Fourth Proportional to 665,978.40, 999,097.20 and 192,679.20

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Solution

The fourth proportional to 665,978.40, 999,097.20 and 192,679.20 is: 289,056.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,978.40 : 999,097.20 = 192,679.20 : x
  2. Step 2: Convert to fraction form
    665,978.40/999,097.20 = 192,679.20/x
  3. Step 3: Cross multiply
    665,978.40x = 999,097.20 × 192,679.20
  4. Step 4: Simplify right side
    665,978.40x = 192,505,249,218.24
  5. Step 5: Solve for x
    x = 192,505,249,218.24/665,978.40
  6. Step 6: Final answer
    x = 289,056.30

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