Finding the Fourth Proportional to 2,115.56, 3,171.17 and 883.69

Step by Step Solution

1. Step 1: Write the proportion equation
   2,115.56 : 3,171.17 = 883.69 : x
2. Step 2: Convert to fraction form
   2,115.56/3,171.17 = 883.69/x
3. Step 3: Cross multiply
   2,115.56x = 3,171.17 × 883.69
4. Step 4: Simplify right side
   2,115.56x = 2,802,325.50
5. Step 5: Solve for x
   x = 2,802,325.50/2,115.56
6. Step 6: Final answer
   x = 1,324.62