Finding the Fourth Proportional to 1,191.52, 1,644.38 and 660.41

Step by Step Solution

1. Step 1: Write the proportion equation
   1,191.52 : 1,644.38 = 660.41 : x
2. Step 2: Convert to fraction form
   1,191.52/1,644.38 = 660.41/x
3. Step 3: Cross multiply
   1,191.52x = 1,644.38 × 660.41
4. Step 4: Simplify right side
   1,191.52x = 1,085,965.00
5. Step 5: Solve for x
   x = 1,085,965.00/1,191.52
6. Step 6: Final answer
   x = 911.41