Finding the Fourth Proportional to 2,499.47, 3,449.21 and 1,380.39

Step by Step Solution

1. Step 1: Write the proportion equation
   2,499.47 : 3,449.21 = 1,380.39 : x
2. Step 2: Convert to fraction form
   2,499.47/3,449.21 = 1,380.39/x
3. Step 3: Cross multiply
   2,499.47x = 3,449.21 × 1,380.39
4. Step 4: Simplify right side
   2,499.47x = 4,761,254.99
5. Step 5: Solve for x
   x = 4,761,254.99/2,499.47
6. Step 6: Final answer
   x = 1,904.91