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Finding the Fourth Proportional to 135,276.77, 186,698.16 and 78,688.14

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Solution

The fourth proportional to 135,276.77, 186,698.16 and 78,688.14 is: 108,599.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,276.77 : 186,698.16 = 78,688.14 : x
  2. Step 2: Convert to fraction form
    135,276.77/186,698.16 = 78,688.14/x
  3. Step 3: Cross multiply
    135,276.77x = 186,698.16 × 78,688.14
  4. Step 4: Simplify right side
    135,276.77x = 14,690,930,951.82
  5. Step 5: Solve for x
    x = 14,690,930,951.82/135,276.77
  6. Step 6: Final answer
    x = 108,599.07

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