Finding the Fourth Proportional to 1,576.89, 2,176.11 and 868.71

Step by Step Solution

1. Step 1: Write the proportion equation
   1,576.89 : 2,176.11 = 868.71 : x
2. Step 2: Convert to fraction form
   1,576.89/2,176.11 = 868.71/x
3. Step 3: Cross multiply
   1,576.89x = 2,176.11 × 868.71
4. Step 4: Simplify right side
   1,576.89x = 1,890,393.29
5. Step 5: Solve for x
   x = 1,890,393.29/1,576.89
6. Step 6: Final answer
   x = 1,198.81