Finding the Fourth Proportional to 1,074.72, 1,481.04 and 724.80

Step by Step Solution

1. Step 1: Write the proportion equation
   1,074.72 : 1,481.04 = 724.80 : x
2. Step 2: Convert to fraction form
   1,074.72/1,481.04 = 724.80/x
3. Step 3: Cross multiply
   1,074.72x = 1,481.04 × 724.80
4. Step 4: Simplify right side
   1,074.72x = 1,073,457.79
5. Step 5: Solve for x
   x = 1,073,457.79/1,074.72
6. Step 6: Final answer
   x = 998.83