Finding the Fourth Proportional to 1,105.71, 1,655.33 and 872.97

Step by Step Solution

1. Step 1: Write the proportion equation
   1,105.71 : 1,655.33 = 872.97 : x
2. Step 2: Convert to fraction form
   1,105.71/1,655.33 = 872.97/x
3. Step 3: Cross multiply
   1,105.71x = 1,655.33 × 872.97
4. Step 4: Simplify right side
   1,105.71x = 1,445,049.07
5. Step 5: Solve for x
   x = 1,445,049.07/1,105.71
6. Step 6: Final answer
   x = 1,306.90