Finding the Fourth Proportional to 921,432.96, 1,271,142.72 and 539,223.12

Step by Step Solution

1. Step 1: Write the proportion equation
   921,432.96 : 1,271,142.72 = 539,223.12 : x
2. Step 2: Convert to fraction form
   921,432.96/1,271,142.72 = 539,223.12/x
3. Step 3: Cross multiply
   921,432.96x = 1,271,142.72 × 539,223.12
4. Step 4: Simplify right side
   921,432.96x = 685,429,543,443.69
5. Step 5: Solve for x
   x = 685,429,543,443.69/921,432.96
6. Step 6: Final answer
   x = 743,873.48