Finding the Fourth Proportional to 721,569.15, 995,870.55 and 415,585.98

Step by Step Solution

1. Step 1: Write the proportion equation
   721,569.15 : 995,870.55 = 415,585.98 : x
2. Step 2: Convert to fraction form
   721,569.15/995,870.55 = 415,585.98/x
3. Step 3: Cross multiply
   721,569.15x = 995,870.55 × 415,585.98
4. Step 4: Simplify right side
   721,569.15x = 413,869,838,474.89
5. Step 5: Solve for x
   x = 413,869,838,474.89/721,569.15
6. Step 6: Final answer
   x = 573,569.20