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Finding the Fourth Proportional to 78,539.52, 108,383.68 and 42,728.96

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Solution

The fourth proportional to 78,539.52, 108,383.68 and 42,728.96 is: 58,965.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,539.52 : 108,383.68 = 42,728.96 : x
  2. Step 2: Convert to fraction form
    78,539.52/108,383.68 = 42,728.96/x
  3. Step 3: Cross multiply
    78,539.52x = 108,383.68 × 42,728.96
  4. Step 4: Simplify right side
    78,539.52x = 4,631,121,927.37
  5. Step 5: Solve for x
    x = 4,631,121,927.37/78,539.52
  6. Step 6: Final answer
    x = 58,965.50

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