Finding the Fourth Proportional to 1,311.49, 1,965.61 and 662.41

Step by Step Solution

1. Step 1: Write the proportion equation
   1,311.49 : 1,965.61 = 662.41 : x
2. Step 2: Convert to fraction form
   1,311.49/1,965.61 = 662.41/x
3. Step 3: Cross multiply
   1,311.49x = 1,965.61 × 662.41
4. Step 4: Simplify right side
   1,311.49x = 1,302,039.72
5. Step 5: Solve for x
   x = 1,302,039.72/1,311.49
6. Step 6: Final answer
   x = 992.79