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Finding the Fourth Proportional to 134,798.40, 186,058.80 and 78,228

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Solution

The fourth proportional to 134,798.40, 186,058.80 and 78,228 is: 107,976.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    134,798.40 : 186,058.80 = 78,228 : x
  2. Step 2: Convert to fraction form
    134,798.40/186,058.80 = 78,228/x
  3. Step 3: Cross multiply
    134,798.40x = 186,058.80 × 78,228
  4. Step 4: Simplify right side
    134,798.40x = 14,555,007,806.40
  5. Step 5: Solve for x
    x = 14,555,007,806.40/134,798.40
  6. Step 6: Final answer
    x = 107,976.12

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