Finding the Fourth Proportional to 868.05, 1,300.56 and 722.73

Step by Step Solution

1. Step 1: Write the proportion equation
   868.05 : 1,300.56 = 722.73 : x
2. Step 2: Convert to fraction form
   868.05/1,300.56 = 722.73/x
3. Step 3: Cross multiply
   868.05x = 1,300.56 × 722.73
4. Step 4: Simplify right side
   868.05x = 939,955.17
5. Step 5: Solve for x
   x = 939,955.17/868.05
6. Step 6: Final answer
   x = 1,082.84