Finding the Fourth Proportional to 1,049.86, 1,576.86 and 660.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,049.86 : 1,576.86 = 660.55 : x
2. Step 2: Convert to fraction form
   1,049.86/1,576.86 = 660.55/x
3. Step 3: Cross multiply
   1,049.86x = 1,576.86 × 660.55
4. Step 4: Simplify right side
   1,049.86x = 1,041,591.57
5. Step 5: Solve for x
   x = 1,041,591.57/1,049.86
6. Step 6: Final answer
   x = 992.13