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Finding the Fourth Proportional to 660,017.06, 990,442.08 and 280,937.18

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Solution

The fourth proportional to 660,017.06, 990,442.08 and 280,937.18 is: 421,583.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,017.06 : 990,442.08 = 280,937.18 : x
  2. Step 2: Convert to fraction form
    660,017.06/990,442.08 = 280,937.18/x
  3. Step 3: Cross multiply
    660,017.06x = 990,442.08 × 280,937.18
  4. Step 4: Simplify right side
    660,017.06x = 278,252,003,503.85
  5. Step 5: Solve for x
    x = 278,252,003,503.85/660,017.06
  6. Step 6: Final answer
    x = 421,583.05

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