Finding the Third Proportional to 63,640.69 and 87,664.78

Step by Step Solution

1. Step 1: Write the proportion equation
   63,640.69 : 87,664.78 = 87,664.78 : x
2. Step 2: Convert to fraction form
   63,640.69/87,664.78 = 87,664.78/x
3. Step 3: Cross multiply
   63,640.69x = 87,664.78 × 87,664.78
4. Step 4: Simplify right side
   63,640.69x = 7,685,113,871.61
5. Step 5: Solve for x
   x = 7,685,113,871.61/63,640.69
6. Step 6: Final answer
   x = 120,757.87