Finding the Fourth Proportional to 861,057.83, 1,188,424.32 and 570,156.30

Step by Step Solution

1. Step 1: Write the proportion equation
   861,057.83 : 1,188,424.32 = 570,156.30 : x
2. Step 2: Convert to fraction form
   861,057.83/1,188,424.32 = 570,156.30/x
3. Step 3: Cross multiply
   861,057.83x = 1,188,424.32 × 570,156.30
4. Step 4: Simplify right side
   861,057.83x = 677,587,613,121.22
5. Step 5: Solve for x
   x = 677,587,613,121.22/861,057.83
6. Step 6: Final answer
   x = 786,924.63