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Finding the Fourth Proportional to 210,707.18, 316,061.10 and 86,048.18

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Solution

The fourth proportional to 210,707.18, 316,061.10 and 86,048.18 is: 129,072.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,707.18 : 316,061.10 = 86,048.18 : x
  2. Step 2: Convert to fraction form
    210,707.18/316,061.10 = 86,048.18/x
  3. Step 3: Cross multiply
    210,707.18x = 316,061.10 × 86,048.18
  4. Step 4: Simplify right side
    210,707.18x = 27,196,482,423.80
  5. Step 5: Solve for x
    x = 27,196,482,423.80/210,707.18
  6. Step 6: Final answer
    x = 129,072.40

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