Finding the Fourth Proportional to 773.82, 1,061.33 and 686.34

Step by Step Solution

1. Step 1: Write the proportion equation
   773.82 : 1,061.33 = 686.34 : x
2. Step 2: Convert to fraction form
   773.82/1,061.33 = 686.34/x
3. Step 3: Cross multiply
   773.82x = 1,061.33 × 686.34
4. Step 4: Simplify right side
   773.82x = 728,429.80
5. Step 5: Solve for x
   x = 728,429.80/773.82
6. Step 6: Final answer
   x = 941.34