Finding the Fourth Proportional to 2,499.91, 3,449.65 and 1,380.76

Step by Step Solution

1. Step 1: Write the proportion equation
   2,499.91 : 3,449.65 = 1,380.76 : x
2. Step 2: Convert to fraction form
   2,499.91/3,449.65 = 1,380.76/x
3. Step 3: Cross multiply
   2,499.91x = 3,449.65 × 1,380.76
4. Step 4: Simplify right side
   2,499.91x = 4,763,138.73
5. Step 5: Solve for x
   x = 4,763,138.73/2,499.91
6. Step 6: Final answer
   x = 1,905.32