Finding the Fourth Proportional to 2,517.50, 3,474.15 and 1,398.54

Step by Step Solution

1. Step 1: Write the proportion equation
   2,517.50 : 3,474.15 = 1,398.54 : x
2. Step 2: Convert to fraction form
   2,517.50/3,474.15 = 1,398.54/x
3. Step 3: Cross multiply
   2,517.50x = 3,474.15 × 1,398.54
4. Step 4: Simplify right side
   2,517.50x = 4,858,749.46
5. Step 5: Solve for x
   x = 4,858,749.46/2,517.50
6. Step 6: Final answer
   x = 1,929.99