Finding the Third Proportional to 15,920.72 and 34,609.78

Step by Step Solution

1. Step 1: Write the proportion equation
   15,920.72 : 34,609.78 = 34,609.78 : x
2. Step 2: Convert to fraction form
   15,920.72/34,609.78 = 34,609.78/x
3. Step 3: Cross multiply
   15,920.72x = 34,609.78 × 34,609.78
4. Step 4: Simplify right side
   15,920.72x = 1,197,836,958.17
5. Step 5: Solve for x
   x = 1,197,836,958.17/15,920.72
6. Step 6: Final answer
   x = 75,237.62