Finding the Fourth Proportional to 788,665.52, 1,087,225.56 and 561,917.36

Step by Step Solution

1. Step 1: Write the proportion equation
   788,665.52 : 1,087,225.56 = 561,917.36 : x
2. Step 2: Convert to fraction form
   788,665.52/1,087,225.56 = 561,917.36/x
3. Step 3: Cross multiply
   788,665.52x = 1,087,225.56 × 561,917.36
4. Step 4: Simplify right side
   788,665.52x = 610,930,916,399.72
5. Step 5: Solve for x
   x = 610,930,916,399.72/788,665.52
6. Step 6: Final answer
   x = 774,638.81