Finding the Fourth Proportional to 1,576.87, 2,176.06 and 868.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,576.87 : 2,176.06 = 868.69 : x
2. Step 2: Convert to fraction form
   1,576.87/2,176.06 = 868.69/x
3. Step 3: Cross multiply
   1,576.87x = 2,176.06 × 868.69
4. Step 4: Simplify right side
   1,576.87x = 1,890,321.56
5. Step 5: Solve for x
   x = 1,890,321.56/1,576.87
6. Step 6: Final answer
   x = 1,198.78