Finding the Fourth Proportional to 2,499.28, 3,449.22 and 1,380.34

Step by Step Solution

1. Step 1: Write the proportion equation
   2,499.28 : 3,449.22 = 1,380.34 : x
2. Step 2: Convert to fraction form
   2,499.28/3,449.22 = 1,380.34/x
3. Step 3: Cross multiply
   2,499.28x = 3,449.22 × 1,380.34
4. Step 4: Simplify right side
   2,499.28x = 4,761,096.33
5. Step 5: Solve for x
   x = 4,761,096.33/2,499.28
6. Step 6: Final answer
   x = 1,904.99