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Finding the Fourth Proportional to 408,978.48, 613,747.95 and 142,739

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Solution

The fourth proportional to 408,978.48, 613,747.95 and 142,739 is: 214,206.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,978.48 : 613,747.95 = 142,739 : x
  2. Step 2: Convert to fraction form
    408,978.48/613,747.95 = 142,739/x
  3. Step 3: Cross multiply
    408,978.48x = 613,747.95 × 142,739
  4. Step 4: Simplify right side
    408,978.48x = 87,605,768,635.05
  5. Step 5: Solve for x
    x = 87,605,768,635.05/408,978.48
  6. Step 6: Final answer
    x = 214,206.30

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