Finding the Fourth Proportional to 2,119.32, 3,179.39 and 658.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,119.32 : 3,179.39 = 658.42 : x
2. Step 2: Convert to fraction form
   2,119.32/3,179.39 = 658.42/x
3. Step 3: Cross multiply
   2,119.32x = 3,179.39 × 658.42
4. Step 4: Simplify right side
   2,119.32x = 2,093,362.72
5. Step 5: Solve for x
   x = 2,093,362.72/2,119.32
6. Step 6: Final answer
   x = 987.75