Finding the Fourth Proportional to 2,508.47, 3,763.92 and 1,398.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,508.47 : 3,763.92 = 1,398.72 : x
2. Step 2: Convert to fraction form
   2,508.47/3,763.92 = 1,398.72/x
3. Step 3: Cross multiply
   2,508.47x = 3,763.92 × 1,398.72
4. Step 4: Simplify right side
   2,508.47x = 5,264,660.50
5. Step 5: Solve for x
   x = 5,264,660.50/2,508.47
6. Step 6: Final answer
   x = 2,098.75