Finding the Third Proportional to 50,939.75 and 78,718

Step by Step Solution

1. Step 1: Write the proportion equation
   50,939.75 : 78,718 = 78,718 : x
2. Step 2: Convert to fraction form
   50,939.75/78,718 = 78,718/x
3. Step 3: Cross multiply
   50,939.75x = 78,718 × 78,718
4. Step 4: Simplify right side
   50,939.75x = 6,196,523,524
5. Step 5: Solve for x
   x = 6,196,523,524/50,939.75
6. Step 6: Final answer
   x = 121,644.17