Finding the Third Proportional to 51,187.50 and 78,968.25

Step by Step Solution

1. Step 1: Write the proportion equation
   51,187.50 : 78,968.25 = 78,968.25 : x
2. Step 2: Convert to fraction form
   51,187.50/78,968.25 = 78,968.25/x
3. Step 3: Cross multiply
   51,187.50x = 78,968.25 × 78,968.25
4. Step 4: Simplify right side
   51,187.50x = 6,235,984,508.06
5. Step 5: Solve for x
   x = 6,235,984,508.06/51,187.50
6. Step 6: Final answer
   x = 121,826.32