Finding the Fourth Proportional to 2,958.72, 4,082.76 and 2,173.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,958.72 : 4,082.76 = 2,173.20 : x
2. Step 2: Convert to fraction form
   2,958.72/4,082.76 = 2,173.20/x
3. Step 3: Cross multiply
   2,958.72x = 4,082.76 × 2,173.20
4. Step 4: Simplify right side
   2,958.72x = 8,872,654.03
5. Step 5: Solve for x
   x = 8,872,654.03/2,958.72
6. Step 6: Final answer
   x = 2,998.82