Finding the Fourth Proportional to 1,108,772.18, 1,530,102.73 and 618,736.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,108,772.18 : 1,530,102.73 = 618,736.55 : x
2. Step 2: Convert to fraction form
   1,108,772.18/1,530,102.73 = 618,736.55/x
3. Step 3: Cross multiply
   1,108,772.18x = 1,530,102.73 × 618,736.55
4. Step 4: Simplify right side
   1,108,772.18x = 946,730,475,108.43
5. Step 5: Solve for x
   x = 946,730,475,108.43/1,108,772.18
6. Step 6: Final answer
   x = 853,854.83