Finding the Fourth Proportional to 2,256.72, 3,386.29 and 871.01

Step by Step Solution

1. Step 1: Write the proportion equation
   2,256.72 : 3,386.29 = 871.01 : x
2. Step 2: Convert to fraction form
   2,256.72/3,386.29 = 871.01/x
3. Step 3: Cross multiply
   2,256.72x = 3,386.29 × 871.01
4. Step 4: Simplify right side
   2,256.72x = 2,949,492.45
5. Step 5: Solve for x
   x = 2,949,492.45/2,256.72
6. Step 6: Final answer
   x = 1,306.98