Finding the Fourth Proportional to 859,103.02, 1,185,523.78 and 515,128.80

Step by Step Solution

1. Step 1: Write the proportion equation
   859,103.02 : 1,185,523.78 = 515,128.80 : x
2. Step 2: Convert to fraction form
   859,103.02/1,185,523.78 = 515,128.80/x
3. Step 3: Cross multiply
   859,103.02x = 1,185,523.78 × 515,128.80
4. Step 4: Simplify right side
   859,103.02x = 610,697,442,162.86
5. Step 5: Solve for x
   x = 610,697,442,162.86/859,103.02
6. Step 6: Final answer
   x = 710,854.73