Finding the Third Proportional to 51,820.50 and 80,021.25

Step by Step Solution

1. Step 1: Write the proportion equation
   51,820.50 : 80,021.25 = 80,021.25 : x
2. Step 2: Convert to fraction form
   51,820.50/80,021.25 = 80,021.25/x
3. Step 3: Cross multiply
   51,820.50x = 80,021.25 × 80,021.25
4. Step 4: Simplify right side
   51,820.50x = 6,403,400,451.56
5. Step 5: Solve for x
   x = 6,403,400,451.56/51,820.50
6. Step 6: Final answer
   x = 123,568.87