Finding the Fourth Proportional to 1,118.01, 1,541.39 and 724.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,118.01 : 1,541.39 = 724.89 : x
2. Step 2: Convert to fraction form
   1,118.01/1,541.39 = 724.89/x
3. Step 3: Cross multiply
   1,118.01x = 1,541.39 × 724.89
4. Step 4: Simplify right side
   1,118.01x = 1,117,334.57
5. Step 5: Solve for x
   x = 1,117,334.57/1,118.01
6. Step 6: Final answer
   x = 999.40