Finding the Fourth Proportional to 2,499.59, 3,449.34 and 1,380.51

Step by Step Solution

1. Step 1: Write the proportion equation
   2,499.59 : 3,449.34 = 1,380.51 : x
2. Step 2: Convert to fraction form
   2,499.59/3,449.34 = 1,380.51/x
3. Step 3: Cross multiply
   2,499.59x = 3,449.34 × 1,380.51
4. Step 4: Simplify right side
   2,499.59x = 4,761,834.57
5. Step 5: Solve for x
   x = 4,761,834.57/2,499.59
6. Step 6: Final answer
   x = 1,905.05