Finding the Fourth Proportional to 2,499.39, 3,449.21 and 1,380.35

Step by Step Solution

1. Step 1: Write the proportion equation
   2,499.39 : 3,449.21 = 1,380.35 : x
2. Step 2: Convert to fraction form
   2,499.39/3,449.21 = 1,380.35/x
3. Step 3: Cross multiply
   2,499.39x = 3,449.21 × 1,380.35
4. Step 4: Simplify right side
   2,499.39x = 4,761,117.02
5. Step 5: Solve for x
   x = 4,761,117.02/2,499.39
6. Step 6: Final answer
   x = 1,904.91