Finding the Fourth Proportional to 1,192.02, 1,644.96 and 668.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,192.02 : 1,644.96 = 668.10 : x
2. Step 2: Convert to fraction form
   1,192.02/1,644.96 = 668.10/x
3. Step 3: Cross multiply
   1,192.02x = 1,644.96 × 668.10
4. Step 4: Simplify right side
   1,192.02x = 1,098,997.78
5. Step 5: Solve for x
   x = 1,098,997.78/1,192.02
6. Step 6: Final answer
   x = 921.96