Finding the Fourth Proportional to 2,499.68, 3,449.58 and 1,380.60

Step by Step Solution

1. Step 1: Write the proportion equation
   2,499.68 : 3,449.58 = 1,380.60 : x
2. Step 2: Convert to fraction form
   2,499.68/3,449.58 = 1,380.60/x
3. Step 3: Cross multiply
   2,499.68x = 3,449.58 × 1,380.60
4. Step 4: Simplify right side
   2,499.68x = 4,762,472.90
5. Step 5: Solve for x
   x = 4,762,472.90/2,499.68
6. Step 6: Final answer
   x = 1,905.23