Finding the Fourth Proportional to 1,179.50, 1,767.56 and 868.91

Step by Step Solution

1. Step 1: Write the proportion equation
   1,179.50 : 1,767.56 = 868.91 : x
2. Step 2: Convert to fraction form
   1,179.50/1,767.56 = 868.91/x
3. Step 3: Cross multiply
   1,179.50x = 1,767.56 × 868.91
4. Step 4: Simplify right side
   1,179.50x = 1,535,841.72
5. Step 5: Solve for x
   x = 1,535,841.72/1,179.50
6. Step 6: Final answer
   x = 1,302.12