Finding the Fourth Proportional to 2,499.53, 3,449.34 and 1,380.54

Step by Step Solution

1. Step 1: Write the proportion equation
   2,499.53 : 3,449.34 = 1,380.54 : x
2. Step 2: Convert to fraction form
   2,499.53/3,449.34 = 1,380.54/x
3. Step 3: Cross multiply
   2,499.53x = 3,449.34 × 1,380.54
4. Step 4: Simplify right side
   2,499.53x = 4,761,944.94
5. Step 5: Solve for x
   x = 4,761,944.94/2,499.53
6. Step 6: Final answer
   x = 1,905.14