Finding the Fourth Proportional to 667.82, 922.72 and 480.94

Step by Step Solution

1. Step 1: Write the proportion equation
   667.82 : 922.72 = 480.94 : x
2. Step 2: Convert to fraction form
   667.82/922.72 = 480.94/x
3. Step 3: Cross multiply
   667.82x = 922.72 × 480.94
4. Step 4: Simplify right side
   667.82x = 443,772.96
5. Step 5: Solve for x
   x = 443,772.96/667.82
6. Step 6: Final answer
   x = 664.51