Finding the Third Proportional to 20,776.50 and 42,778.13

Step by Step Solution

1. Step 1: Write the proportion equation
   20,776.50 : 42,778.13 = 42,778.13 : x
2. Step 2: Convert to fraction form
   20,776.50/42,778.13 = 42,778.13/x
3. Step 3: Cross multiply
   20,776.50x = 42,778.13 × 42,778.13
4. Step 4: Simplify right side
   20,776.50x = 1,829,967,978.52
5. Step 5: Solve for x
   x = 1,829,967,978.52/20,776.50
6. Step 6: Final answer
   x = 88,078.74