Finding the Fourth Proportional to 1,128,085.50, 1,556,758 and 618,789.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,128,085.50 : 1,556,758 = 618,789.10 : x
2. Step 2: Convert to fraction form
   1,128,085.50/1,556,758 = 618,789.10/x
3. Step 3: Cross multiply
   1,128,085.50x = 1,556,758 × 618,789.10
4. Step 4: Simplify right side
   1,128,085.50x = 963,304,881,737.80
5. Step 5: Solve for x
   x = 963,304,881,737.80/1,128,085.50
6. Step 6: Final answer
   x = 853,928.96