Finding the Fourth Proportional to 1,192.89, 1,646.01 and 668.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,192.89 : 1,646.01 = 668.82 : x
2. Step 2: Convert to fraction form
   1,192.89/1,646.01 = 668.82/x
3. Step 3: Cross multiply
   1,192.89x = 1,646.01 × 668.82
4. Step 4: Simplify right side
   1,192.89x = 1,100,884.41
5. Step 5: Solve for x
   x = 1,100,884.41/1,192.89
6. Step 6: Final answer
   x = 922.87