Finding the Fourth Proportional to 2,517.90, 3,474.72 and 1,398.84

Step by Step Solution

1. Step 1: Write the proportion equation
   2,517.90 : 3,474.72 = 1,398.84 : x
2. Step 2: Convert to fraction form
   2,517.90/3,474.72 = 1,398.84/x
3. Step 3: Cross multiply
   2,517.90x = 3,474.72 × 1,398.84
4. Step 4: Simplify right side
   2,517.90x = 4,860,577.32
5. Step 5: Solve for x
   x = 4,860,577.32/2,517.90
6. Step 6: Final answer
   x = 1,930.41