Finding the Third Proportional to 2,921.91 and 7,672.13

Step by Step Solution

1. Step 1: Write the proportion equation
   2,921.91 : 7,672.13 = 7,672.13 : x
2. Step 2: Convert to fraction form
   2,921.91/7,672.13 = 7,672.13/x
3. Step 3: Cross multiply
   2,921.91x = 7,672.13 × 7,672.13
4. Step 4: Simplify right side
   2,921.91x = 58,861,502.02
5. Step 5: Solve for x
   x = 58,861,502.02/2,921.91
6. Step 6: Final answer
   x = 20,144.90