Finding the Fourth Proportional to 868.23, 1,196.98 and 680.99

Step by Step Solution

1. Step 1: Write the proportion equation
   868.23 : 1,196.98 = 680.99 : x
2. Step 2: Convert to fraction form
   868.23/1,196.98 = 680.99/x
3. Step 3: Cross multiply
   868.23x = 1,196.98 × 680.99
4. Step 4: Simplify right side
   868.23x = 815,123.72
5. Step 5: Solve for x
   x = 815,123.72/868.23
6. Step 6: Final answer
   x = 938.83