Finding the Fourth Proportional to 1,096.59, 1,513.30 and 724.20

Step by Step Solution

1. Step 1: Write the proportion equation
   1,096.59 : 1,513.30 = 724.20 : x
2. Step 2: Convert to fraction form
   1,096.59/1,513.30 = 724.20/x
3. Step 3: Cross multiply
   1,096.59x = 1,513.30 × 724.20
4. Step 4: Simplify right side
   1,096.59x = 1,095,925.73
5. Step 5: Solve for x
   x = 1,095,925.73/1,096.59
6. Step 6: Final answer
   x = 999.39