Finding the Third Proportional to 51,013.50 and 78,793.50

Step by Step Solution

1. Step 1: Write the proportion equation
   51,013.50 : 78,793.50 = 78,793.50 : x
2. Step 2: Convert to fraction form
   51,013.50/78,793.50 = 78,793.50/x
3. Step 3: Cross multiply
   51,013.50x = 78,793.50 × 78,793.50
4. Step 4: Simplify right side
   51,013.50x = 6,208,415,642.25
5. Step 5: Solve for x
   x = 6,208,415,642.25/51,013.50
6. Step 6: Final answer
   x = 121,701.42