Finding the Fourth Proportional to 2,392.72, 3,588.67 and 660.94

Step by Step Solution

1. Step 1: Write the proportion equation
   2,392.72 : 3,588.67 = 660.94 : x
2. Step 2: Convert to fraction form
   2,392.72/3,588.67 = 660.94/x
3. Step 3: Cross multiply
   2,392.72x = 3,588.67 × 660.94
4. Step 4: Simplify right side
   2,392.72x = 2,371,895.55
5. Step 5: Solve for x
   x = 2,371,895.55/2,392.72
6. Step 6: Final answer
   x = 991.30