Finding the Third Proportional to 126,720 and 277,836.75

Step by Step Solution

1. Step 1: Write the proportion equation
   126,720 : 277,836.75 = 277,836.75 : x
2. Step 2: Convert to fraction form
   126,720/277,836.75 = 277,836.75/x
3. Step 3: Cross multiply
   126,720x = 277,836.75 × 277,836.75
4. Step 4: Simplify right side
   126,720x = 77,193,259,650.56
5. Step 5: Solve for x
   x = 77,193,259,650.56/126,720
6. Step 6: Final answer
   x = 609,163.98