Finding the Fourth Proportional to 1,128,205.50, 1,556,915.86 and 611,957.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,128,205.50 : 1,556,915.86 = 611,957.31 : x
2. Step 2: Convert to fraction form
   1,128,205.50/1,556,915.86 = 611,957.31/x
3. Step 3: Cross multiply
   1,128,205.50x = 1,556,915.86 × 611,957.31
4. Step 4: Simplify right side
   1,128,205.50x = 952,766,041,581.94
5. Step 5: Solve for x
   x = 952,766,041,581.94/1,128,205.50
6. Step 6: Final answer
   x = 844,496.89