Finding the Fourth Proportional to 1,724.88, 2,380.27 and 938.91

Step by Step Solution

1. Step 1: Write the proportion equation
   1,724.88 : 2,380.27 = 938.91 : x
2. Step 2: Convert to fraction form
   1,724.88/2,380.27 = 938.91/x
3. Step 3: Cross multiply
   1,724.88x = 2,380.27 × 938.91
4. Step 4: Simplify right side
   1,724.88x = 2,234,854.61
5. Step 5: Solve for x
   x = 2,234,854.61/1,724.88
6. Step 6: Final answer
   x = 1,295.66