Finding the Fourth Proportional to 1,023.58, 1,411.48 and 724.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,023.58 : 1,411.48 = 724.69 : x
2. Step 2: Convert to fraction form
   1,023.58/1,411.48 = 724.69/x
3. Step 3: Cross multiply
   1,023.58x = 1,411.48 × 724.69
4. Step 4: Simplify right side
   1,023.58x = 1,022,880.10
5. Step 5: Solve for x
   x = 1,022,880.10/1,023.58
6. Step 6: Final answer
   x = 999.32