Finding the Fourth Proportional to 2,499.71, 3,449.39 and 1,380.65

Step by Step Solution

1. Step 1: Write the proportion equation
   2,499.71 : 3,449.39 = 1,380.65 : x
2. Step 2: Convert to fraction form
   2,499.71/3,449.39 = 1,380.65/x
3. Step 3: Cross multiply
   2,499.71x = 3,449.39 × 1,380.65
4. Step 4: Simplify right side
   2,499.71x = 4,762,393.40
5. Step 5: Solve for x
   x = 4,762,393.40/2,499.71
6. Step 6: Final answer
   x = 1,905.18