Finding the Fourth Proportional to 1,527.18, 2,288.61 and 724.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,527.18 : 2,288.61 = 724.89 : x
2. Step 2: Convert to fraction form
   1,527.18/2,288.61 = 724.89/x
3. Step 3: Cross multiply
   1,527.18x = 2,288.61 × 724.89
4. Step 4: Simplify right side
   1,527.18x = 1,658,990.50
5. Step 5: Solve for x
   x = 1,658,990.50/1,527.18
6. Step 6: Final answer
   x = 1,086.31