Finding the Fourth Proportional to 2,119.82, 3,180.12 and 658.61

Step by Step Solution

1. Step 1: Write the proportion equation
   2,119.82 : 3,180.12 = 658.61 : x
2. Step 2: Convert to fraction form
   2,119.82/3,180.12 = 658.61/x
3. Step 3: Cross multiply
   2,119.82x = 3,180.12 × 658.61
4. Step 4: Simplify right side
   2,119.82x = 2,094,458.83
5. Step 5: Solve for x
   x = 2,094,458.83/2,119.82
6. Step 6: Final answer
   x = 988.04