Finding the Fourth Proportional to 2,499.17, 3,448.85 and 1,380.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,499.17 : 3,448.85 = 1,380.15 : x
2. Step 2: Convert to fraction form
   2,499.17/3,448.85 = 1,380.15/x
3. Step 3: Cross multiply
   2,499.17x = 3,448.85 × 1,380.15
4. Step 4: Simplify right side
   2,499.17x = 4,759,923.43
5. Step 5: Solve for x
   x = 4,759,923.43/2,499.17
6. Step 6: Final answer
   x = 1,904.61