Finding the Third Proportional to 50,972 and 78,730

Step by Step Solution

1. Step 1: Write the proportion equation
   50,972 : 78,730 = 78,730 : x
2. Step 2: Convert to fraction form
   50,972/78,730 = 78,730/x
3. Step 3: Cross multiply
   50,972x = 78,730 × 78,730
4. Step 4: Simplify right side
   50,972x = 6,198,412,900
5. Step 5: Solve for x
   x = 6,198,412,900/50,972
6. Step 6: Final answer
   x = 121,604.27