Finding the Fourth Proportional to 1,168.82, 1,612.69 and 664.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,168.82 : 1,612.69 = 664.56 : x
2. Step 2: Convert to fraction form
   1,168.82/1,612.69 = 664.56/x
3. Step 3: Cross multiply
   1,168.82x = 1,612.69 × 664.56
4. Step 4: Simplify right side
   1,168.82x = 1,071,729.27
5. Step 5: Solve for x
   x = 1,071,729.27/1,168.82
6. Step 6: Final answer
   x = 916.93