Finding the Fourth Proportional to 1,191.24, 1,643.96 and 667.27

Step by Step Solution

1. Step 1: Write the proportion equation
   1,191.24 : 1,643.96 = 667.27 : x
2. Step 2: Convert to fraction form
   1,191.24/1,643.96 = 667.27/x
3. Step 3: Cross multiply
   1,191.24x = 1,643.96 × 667.27
4. Step 4: Simplify right side
   1,191.24x = 1,096,962.75
5. Step 5: Solve for x
   x = 1,096,962.75/1,191.24
6. Step 6: Final answer
   x = 920.86