Finding the Fourth Proportional to 1,151.91, 1,728.49 and 502.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,151.91 : 1,728.49 = 502.61 : x
2. Step 2: Convert to fraction form
   1,151.91/1,728.49 = 502.61/x
3. Step 3: Cross multiply
   1,151.91x = 1,728.49 × 502.61
4. Step 4: Simplify right side
   1,151.91x = 868,746.46
5. Step 5: Solve for x
   x = 868,746.46/1,151.91
6. Step 6: Final answer
   x = 754.18