Finding the Fourth Proportional to 1,076.81, 1,616.22 and 614.49

Step by Step Solution

1. Step 1: Write the proportion equation
   1,076.81 : 1,616.22 = 614.49 : x
2. Step 2: Convert to fraction form
   1,076.81/1,616.22 = 614.49/x
3. Step 3: Cross multiply
   1,076.81x = 1,616.22 × 614.49
4. Step 4: Simplify right side
   1,076.81x = 993,151.03
5. Step 5: Solve for x
   x = 993,151.03/1,076.81
6. Step 6: Final answer
   x = 922.31