Finding the Fourth Proportional to 1,117.56, 1,541.25 and 724.71

Step by Step Solution

1. Step 1: Write the proportion equation
   1,117.56 : 1,541.25 = 724.71 : x
2. Step 2: Convert to fraction form
   1,117.56/1,541.25 = 724.71/x
3. Step 3: Cross multiply
   1,117.56x = 1,541.25 × 724.71
4. Step 4: Simplify right side
   1,117.56x = 1,116,959.29
5. Step 5: Solve for x
   x = 1,116,959.29/1,117.56
6. Step 6: Final answer
   x = 999.46