Finding the Third Proportional to 50,389.50 and 78,647.25

Step by Step Solution

1. Step 1: Write the proportion equation
   50,389.50 : 78,647.25 = 78,647.25 : x
2. Step 2: Convert to fraction form
   50,389.50/78,647.25 = 78,647.25/x
3. Step 3: Cross multiply
   50,389.50x = 78,647.25 × 78,647.25
4. Step 4: Simplify right side
   50,389.50x = 6,185,389,932.56
5. Step 5: Solve for x
   x = 6,185,389,932.56/50,389.50
6. Step 6: Final answer
   x = 122,751.56