Finding the Fourth Proportional to 2,517.35, 3,474.05 and 1,398.39

Step by Step Solution

1. Step 1: Write the proportion equation
   2,517.35 : 3,474.05 = 1,398.39 : x
2. Step 2: Convert to fraction form
   2,517.35/3,474.05 = 1,398.39/x
3. Step 3: Cross multiply
   2,517.35x = 3,474.05 × 1,398.39
4. Step 4: Simplify right side
   2,517.35x = 4,858,070.46
5. Step 5: Solve for x
   x = 4,858,070.46/2,517.35
6. Step 6: Final answer
   x = 1,929.84