Finding the Third Proportional to 51,380 and 76,860

Step by Step Solution

1. Step 1: Write the proportion equation
   51,380 : 76,860 = 76,860 : x
2. Step 2: Convert to fraction form
   51,380/76,860 = 76,860/x
3. Step 3: Cross multiply
   51,380x = 76,860 × 76,860
4. Step 4: Simplify right side
   51,380x = 5,907,459,600
5. Step 5: Solve for x
   x = 5,907,459,600/51,380
6. Step 6: Final answer
   x = 114,975.86