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Finding the Fourth Proportional to 78,604.20, 117,906.64 and 19,439.70

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Solution

The fourth proportional to 78,604.20, 117,906.64 and 19,439.70 is: 29,159.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,604.20 : 117,906.64 = 19,439.70 : x
  2. Step 2: Convert to fraction form
    78,604.20/117,906.64 = 19,439.70/x
  3. Step 3: Cross multiply
    78,604.20x = 117,906.64 × 19,439.70
  4. Step 4: Simplify right side
    78,604.20x = 2,292,069,218.86
  5. Step 5: Solve for x
    x = 2,292,069,218.86/78,604.20
  6. Step 6: Final answer
    x = 29,159.63

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