Finding the Third Proportional to 12,561 and 20,077.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,561 : 20,077.50 = 20,077.50 : x
2. Step 2: Convert to fraction form
   12,561/20,077.50 = 20,077.50/x
3. Step 3: Cross multiply
   12,561x = 20,077.50 × 20,077.50
4. Step 4: Simplify right side
   12,561x = 403,106,006.25
5. Step 5: Solve for x
   x = 403,106,006.25/12,561
6. Step 6: Final answer
   x = 32,091.87