Finding the Fourth Proportional to 2,255.10, 3,380.37 and 867.36

Step by Step Solution

1. Step 1: Write the proportion equation
   2,255.10 : 3,380.37 = 867.36 : x
2. Step 2: Convert to fraction form
   2,255.10/3,380.37 = 867.36/x
3. Step 3: Cross multiply
   2,255.10x = 3,380.37 × 867.36
4. Step 4: Simplify right side
   2,255.10x = 2,931,997.72
5. Step 5: Solve for x
   x = 2,931,997.72/2,255.10
6. Step 6: Final answer
   x = 1,300.16