Finding the Fourth Proportional to 2,119.98, 3,180.31 and 658.83

Step by Step Solution

1. Step 1: Write the proportion equation
   2,119.98 : 3,180.31 = 658.83 : x
2. Step 2: Convert to fraction form
   2,119.98/3,180.31 = 658.83/x
3. Step 3: Cross multiply
   2,119.98x = 3,180.31 × 658.83
4. Step 4: Simplify right side
   2,119.98x = 2,095,283.64
5. Step 5: Solve for x
   x = 2,095,283.64/2,119.98
6. Step 6: Final answer
   x = 988.35