Finding the Fourth Proportional to 869,086.38, 1,304,003.23 and 420,144.83

Step by Step Solution

1. Step 1: Write the proportion equation
   869,086.38 : 1,304,003.23 = 420,144.83 : x
2. Step 2: Convert to fraction form
   869,086.38/1,304,003.23 = 420,144.83/x
3. Step 3: Cross multiply
   869,086.38x = 1,304,003.23 × 420,144.83
4. Step 4: Simplify right side
   869,086.38x = 547,870,209,918.15
5. Step 5: Solve for x
   x = 547,870,209,918.15/869,086.38
6. Step 6: Final answer
   x = 630,397.88