Finding the Fourth Proportional to 725,061.98, 1,086,475.17 and 388,147.34

Step by Step Solution

1. Step 1: Write the proportion equation
   725,061.98 : 1,086,475.17 = 388,147.34 : x
2. Step 2: Convert to fraction form
   725,061.98/1,086,475.17 = 388,147.34/x
3. Step 3: Cross multiply
   725,061.98x = 1,086,475.17 × 388,147.34
4. Step 4: Simplify right side
   725,061.98x = 421,712,447,211.55
5. Step 5: Solve for x
   x = 421,712,447,211.55/725,061.98
6. Step 6: Final answer
   x = 581,622.62