Finding the Fourth Proportional to 2,499.62, 3,449.47 and 1,380.63

Step by Step Solution

1. Step 1: Write the proportion equation
   2,499.62 : 3,449.47 = 1,380.63 : x
2. Step 2: Convert to fraction form
   2,499.62/3,449.47 = 1,380.63/x
3. Step 3: Cross multiply
   2,499.62x = 3,449.47 × 1,380.63
4. Step 4: Simplify right side
   2,499.62x = 4,762,445.26
5. Step 5: Solve for x
   x = 4,762,445.26/2,499.62
6. Step 6: Final answer
   x = 1,905.27