Finding the Fourth Proportional to 1,123,831.72, 1,685,466.96 and 440,857.38

Step by Step Solution

1. Step 1: Write the proportion equation
   1,123,831.72 : 1,685,466.96 = 440,857.38 : x
2. Step 2: Convert to fraction form
   1,123,831.72/1,685,466.96 = 440,857.38/x
3. Step 3: Cross multiply
   1,123,831.72x = 1,685,466.96 × 440,857.38
4. Step 4: Simplify right side
   1,123,831.72x = 743,050,548,062.17
5. Step 5: Solve for x
   x = 743,050,548,062.17/1,123,831.72
6. Step 6: Final answer
   x = 661,175.99