Finding the Fourth Proportional to 1,191.52, 1,644.33 and 667.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,191.52 : 1,644.33 = 667.59 : x
2. Step 2: Convert to fraction form
   1,191.52/1,644.33 = 667.59/x
3. Step 3: Cross multiply
   1,191.52x = 1,644.33 × 667.59
4. Step 4: Simplify right side
   1,191.52x = 1,097,738.26
5. Step 5: Solve for x
   x = 1,097,738.26/1,191.52
6. Step 6: Final answer
   x = 921.29