Finding the Fourth Proportional to 661,821.96, 913,513.97 and 572,141.29

Step by Step Solution

1. Step 1: Write the proportion equation
   661,821.96 : 913,513.97 = 572,141.29 : x
2. Step 2: Convert to fraction form
   661,821.96/913,513.97 = 572,141.29/x
3. Step 3: Cross multiply
   661,821.96x = 913,513.97 × 572,141.29
4. Step 4: Simplify right side
   661,821.96x = 522,659,061,228.82
5. Step 5: Solve for x
   x = 522,659,061,228.82/661,821.96
6. Step 6: Final answer
   x = 789,727.59