Finding the Third Proportional to 51,799.50 and 78,399.50

Step by Step Solution

1. Step 1: Write the proportion equation
   51,799.50 : 78,399.50 = 78,399.50 : x
2. Step 2: Convert to fraction form
   51,799.50/78,399.50 = 78,399.50/x
3. Step 3: Cross multiply
   51,799.50x = 78,399.50 × 78,399.50
4. Step 4: Simplify right side
   51,799.50x = 6,146,481,600.25
5. Step 5: Solve for x
   x = 6,146,481,600.25/51,799.50
6. Step 6: Final answer
   x = 118,659.09