Finding the Fourth Proportional to 825,498.47, 1,138,705.31 and 519,089.75

Step by Step Solution

1. Step 1: Write the proportion equation
   825,498.47 : 1,138,705.31 = 519,089.75 : x
2. Step 2: Convert to fraction form
   825,498.47/1,138,705.31 = 519,089.75/x
3. Step 3: Cross multiply
   825,498.47x = 1,138,705.31 × 519,089.75
4. Step 4: Simplify right side
   825,498.47x = 591,090,254,691.57
5. Step 5: Solve for x
   x = 591,090,254,691.57/825,498.47
6. Step 6: Final answer
   x = 716,040.40