Finding the Third Proportional to 50,868.50 and 78,858.75

Step by Step Solution

1. Step 1: Write the proportion equation
   50,868.50 : 78,858.75 = 78,858.75 : x
2. Step 2: Convert to fraction form
   50,868.50/78,858.75 = 78,858.75/x
3. Step 3: Cross multiply
   50,868.50x = 78,858.75 × 78,858.75
4. Step 4: Simplify right side
   50,868.50x = 6,218,702,451.56
5. Step 5: Solve for x
   x = 6,218,702,451.56/50,868.50
6. Step 6: Final answer
   x = 122,250.56