Finding the Fourth Proportional to 921,443.42, 1,271,695.20 and 513,582.50

Step by Step Solution

1. Step 1: Write the proportion equation
   921,443.42 : 1,271,695.20 = 513,582.50 : x
2. Step 2: Convert to fraction form
   921,443.42/1,271,695.20 = 513,582.50/x
3. Step 3: Cross multiply
   921,443.42x = 1,271,695.20 × 513,582.50
4. Step 4: Simplify right side
   921,443.42x = 653,120,400,054
5. Step 5: Solve for x
   x = 653,120,400,054/921,443.42
6. Step 6: Final answer
   x = 708,801.42