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Finding the Fourth Proportional to 52,138.80, 78,208.36 and 12,695.92

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Solution

The fourth proportional to 52,138.80, 78,208.36 and 12,695.92 is: 19,043.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,138.80 : 78,208.36 = 12,695.92 : x
  2. Step 2: Convert to fraction form
    52,138.80/78,208.36 = 12,695.92/x
  3. Step 3: Cross multiply
    52,138.80x = 78,208.36 × 12,695.92
  4. Step 4: Simplify right side
    52,138.80x = 992,927,081.89
  5. Step 5: Solve for x
    x = 992,927,081.89/52,138.80
  6. Step 6: Final answer
    x = 19,043.92

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