Finding the Fourth Proportional to 2,499.43, 3,449.31 and 1,380.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,499.43 : 3,449.31 = 1,380.42 : x
2. Step 2: Convert to fraction form
   2,499.43/3,449.31 = 1,380.42/x
3. Step 3: Cross multiply
   2,499.43x = 3,449.31 × 1,380.42
4. Step 4: Simplify right side
   2,499.43x = 4,761,496.51
5. Step 5: Solve for x
   x = 4,761,496.51/2,499.43
6. Step 6: Final answer
   x = 1,905.03