Finding the Fourth Proportional to 2,499.64, 3,449.51 and 1,380.58

Step by Step Solution

1. Step 1: Write the proportion equation
   2,499.64 : 3,449.51 = 1,380.58 : x
2. Step 2: Convert to fraction form
   2,499.64/3,449.51 = 1,380.58/x
3. Step 3: Cross multiply
   2,499.64x = 3,449.51 × 1,380.58
4. Step 4: Simplify right side
   2,499.64x = 4,762,317.61
5. Step 5: Solve for x
   x = 4,762,317.61/2,499.64
6. Step 6: Final answer
   x = 1,905.20