Finding the Third Proportional to 51,721.50 and 79,087.50

Step by Step Solution

1. Step 1: Write the proportion equation
   51,721.50 : 79,087.50 = 79,087.50 : x
2. Step 2: Convert to fraction form
   51,721.50/79,087.50 = 79,087.50/x
3. Step 3: Cross multiply
   51,721.50x = 79,087.50 × 79,087.50
4. Step 4: Simplify right side
   51,721.50x = 6,254,832,656.25
5. Step 5: Solve for x
   x = 6,254,832,656.25/51,721.50
6. Step 6: Final answer
   x = 120,932.93