Finding the Fourth Proportional to 2,517.55, 3,474.02 and 1,398.47

Step by Step Solution

1. Step 1: Write the proportion equation
   2,517.55 : 3,474.02 = 1,398.47 : x
2. Step 2: Convert to fraction form
   2,517.55/3,474.02 = 1,398.47/x
3. Step 3: Cross multiply
   2,517.55x = 3,474.02 × 1,398.47
4. Step 4: Simplify right side
   2,517.55x = 4,858,298.88
5. Step 5: Solve for x
   x = 4,858,298.88/2,517.55
6. Step 6: Final answer
   x = 1,929.77