Finding the Fourth Proportional to 525,573.52, 725,076.72 and 388,081.92

Step by Step Solution

1. Step 1: Write the proportion equation
   525,573.52 : 725,076.72 = 388,081.92 : x
2. Step 2: Convert to fraction form
   525,573.52/725,076.72 = 388,081.92/x
3. Step 3: Cross multiply
   525,573.52x = 725,076.72 × 388,081.92
4. Step 4: Simplify right side
   525,573.52x = 281,389,165,644.90
5. Step 5: Solve for x
   x = 281,389,165,644.90/525,573.52
6. Step 6: Final answer
   x = 535,394.49