Finding the Fourth Proportional to 828,390.20, 1,143,185.27 and 465,810.89

Step by Step Solution

1. Step 1: Write the proportion equation
   828,390.20 : 1,143,185.27 = 465,810.89 : x
2. Step 2: Convert to fraction form
   828,390.20/1,143,185.27 = 465,810.89/x
3. Step 3: Cross multiply
   828,390.20x = 1,143,185.27 × 465,810.89
4. Step 4: Simplify right side
   828,390.20x = 532,508,140,008.61
5. Step 5: Solve for x
   x = 532,508,140,008.61/828,390.20
6. Step 6: Final answer
   x = 642,822.84