Finding the Fourth Proportional to 2,517.57, 3,474.34 and 1,398.59

Step by Step Solution

1. Step 1: Write the proportion equation
   2,517.57 : 3,474.34 = 1,398.59 : x
2. Step 2: Convert to fraction form
   2,517.57/3,474.34 = 1,398.59/x
3. Step 3: Cross multiply
   2,517.57x = 3,474.34 × 1,398.59
4. Step 4: Simplify right side
   2,517.57x = 4,859,152.82
5. Step 5: Solve for x
   x = 4,859,152.82/2,517.57
6. Step 6: Final answer
   x = 1,930.10