Finding the Fourth Proportional to 2,517.57, 3,474.23 and 1,398.52

Step by Step Solution

1. Step 1: Write the proportion equation
   2,517.57 : 3,474.23 = 1,398.52 : x
2. Step 2: Convert to fraction form
   2,517.57/3,474.23 = 1,398.52/x
3. Step 3: Cross multiply
   2,517.57x = 3,474.23 × 1,398.52
4. Step 4: Simplify right side
   2,517.57x = 4,858,780.14
5. Step 5: Solve for x
   x = 4,858,780.14/2,517.57
6. Step 6: Final answer
   x = 1,929.95