Finding the Fourth Proportional to 1,057,291.92, 1,459,095.42 and 621,630.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,057,291.92 : 1,459,095.42 = 621,630.25 : x
2. Step 2: Convert to fraction form
   1,057,291.92/1,459,095.42 = 621,630.25/x
3. Step 3: Cross multiply
   1,057,291.92x = 1,459,095.42 × 621,630.25
4. Step 4: Simplify right side
   1,057,291.92x = 907,017,849,391.83
5. Step 5: Solve for x
   x = 907,017,849,391.83/1,057,291.92
6. Step 6: Final answer
   x = 857,868.89