Finding the Fourth Proportional to 661,782.50, 992,784.47 and 519,622.04

Step by Step Solution

1. Step 1: Write the proportion equation
   661,782.50 : 992,784.47 = 519,622.04 : x
2. Step 2: Convert to fraction form
   661,782.50/992,784.47 = 519,622.04/x
3. Step 3: Cross multiply
   661,782.50x = 992,784.47 × 519,622.04
4. Step 4: Simplify right side
   661,782.50x = 515,872,684,019.69
5. Step 5: Solve for x
   x = 515,872,684,019.69/661,782.50
6. Step 6: Final answer
   x = 779,519.99