Finding the Third Proportional to 101,712.50 and 212,720

Step by Step Solution

1. Step 1: Write the proportion equation
   101,712.50 : 212,720 = 212,720 : x
2. Step 2: Convert to fraction form
   101,712.50/212,720 = 212,720/x
3. Step 3: Cross multiply
   101,712.50x = 212,720 × 212,720
4. Step 4: Simplify right side
   101,712.50x = 45,249,798,400
5. Step 5: Solve for x
   x = 45,249,798,400/101,712.50
6. Step 6: Final answer
   x = 444,879.42