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Finding the Fourth Proportional to 78,558.71, 117,838.31 and 19,394.39

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Solution

The fourth proportional to 78,558.71, 117,838.31 and 19,394.39 is: 29,091.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,558.71 : 117,838.31 = 19,394.39 : x
  2. Step 2: Convert to fraction form
    78,558.71/117,838.31 = 19,394.39/x
  3. Step 3: Cross multiply
    78,558.71x = 117,838.31 × 19,394.39
  4. Step 4: Simplify right side
    78,558.71x = 2,285,401,454.92
  5. Step 5: Solve for x
    x = 2,285,401,454.92/78,558.71
  6. Step 6: Final answer
    x = 29,091.64

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