Finding the Third Proportional to 50,860.50 and 78,687

Step by Step Solution

1. Step 1: Write the proportion equation
   50,860.50 : 78,687 = 78,687 : x
2. Step 2: Convert to fraction form
   50,860.50/78,687 = 78,687/x
3. Step 3: Cross multiply
   50,860.50x = 78,687 × 78,687
4. Step 4: Simplify right side
   50,860.50x = 6,191,643,969
5. Step 5: Solve for x
   x = 6,191,643,969/50,860.50
6. Step 6: Final answer
   x = 121,737.77