Finding the Fourth Proportional to 1,108,774.18, 1,530,105.49 and 618,738.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,108,774.18 : 1,530,105.49 = 618,738.55 : x
2. Step 2: Convert to fraction form
   1,108,774.18/1,530,105.49 = 618,738.55/x
3. Step 3: Cross multiply
   1,108,774.18x = 1,530,105.49 × 618,738.55
4. Step 4: Simplify right side
   1,108,774.18x = 946,735,252,229.64
5. Step 5: Solve for x
   x = 946,735,252,229.64/1,108,774.18
6. Step 6: Final answer
   x = 853,857.59