Finding the Fourth Proportional to 1,116.79, 1,540.96 and 668.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,116.79 : 1,540.96 = 668.52 : x
2. Step 2: Convert to fraction form
   1,116.79/1,540.96 = 668.52/x
3. Step 3: Cross multiply
   1,116.79x = 1,540.96 × 668.52
4. Step 4: Simplify right side
   1,116.79x = 1,030,160.91
5. Step 5: Solve for x
   x = 1,030,160.91/1,116.79
6. Step 6: Final answer
   x = 922.43