Finding the Fourth Proportional to 2,498.56, 3,747.92 and 938.40

Step by Step Solution

1. Step 1: Write the proportion equation
   2,498.56 : 3,747.92 = 938.40 : x
2. Step 2: Convert to fraction form
   2,498.56/3,747.92 = 938.40/x
3. Step 3: Cross multiply
   2,498.56x = 3,747.92 × 938.40
4. Step 4: Simplify right side
   2,498.56x = 3,517,048.13
5. Step 5: Solve for x
   x = 3,517,048.13/2,498.56
6. Step 6: Final answer
   x = 1,407.63