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Finding the Fourth Proportional to 213,990.71, 320,985.28 and 64,230.35

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Solution

The fourth proportional to 213,990.71, 320,985.28 and 64,230.35 is: 96,345.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,990.71 : 320,985.28 = 64,230.35 : x
  2. Step 2: Convert to fraction form
    213,990.71/320,985.28 = 64,230.35/x
  3. Step 3: Cross multiply
    213,990.71x = 320,985.28 × 64,230.35
  4. Step 4: Simplify right side
    213,990.71x = 20,616,996,879.25
  5. Step 5: Solve for x
    x = 20,616,996,879.25/213,990.71
  6. Step 6: Final answer
    x = 96,345.29

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