Finding the Third Proportional to 131,496 and 213,638

Step by Step Solution

1. Step 1: Write the proportion equation
   131,496 : 213,638 = 213,638 : x
2. Step 2: Convert to fraction form
   131,496/213,638 = 213,638/x
3. Step 3: Cross multiply
   131,496x = 213,638 × 213,638
4. Step 4: Simplify right side
   131,496x = 45,641,195,044
5. Step 5: Solve for x
   x = 45,641,195,044/131,496
6. Step 6: Final answer
   x = 347,091.89