Finding the Fourth Proportional to 1,127.72, 1,688.04 and 868.73

Step by Step Solution

1. Step 1: Write the proportion equation
   1,127.72 : 1,688.04 = 868.73 : x
2. Step 2: Convert to fraction form
   1,127.72/1,688.04 = 868.73/x
3. Step 3: Cross multiply
   1,127.72x = 1,688.04 × 868.73
4. Step 4: Simplify right side
   1,127.72x = 1,466,442.55
5. Step 5: Solve for x
   x = 1,466,442.55/1,127.72
6. Step 6: Final answer
   x = 1,300.36