Finding the Third Proportional to 51,721.50 and 79,086.25

Step by Step Solution

1. Step 1: Write the proportion equation
   51,721.50 : 79,086.25 = 79,086.25 : x
2. Step 2: Convert to fraction form
   51,721.50/79,086.25 = 79,086.25/x
3. Step 3: Cross multiply
   51,721.50x = 79,086.25 × 79,086.25
4. Step 4: Simplify right side
   51,721.50x = 6,254,634,939.06
5. Step 5: Solve for x
   x = 6,254,634,939.06/51,721.50
6. Step 6: Final answer
   x = 120,929.11