Finding the Third Proportional to 64,212.50 and 85,202.50

Step by Step Solution

1. Step 1: Write the proportion equation
   64,212.50 : 85,202.50 = 85,202.50 : x
2. Step 2: Convert to fraction form
   64,212.50/85,202.50 = 85,202.50/x
3. Step 3: Cross multiply
   64,212.50x = 85,202.50 × 85,202.50
4. Step 4: Simplify right side
   64,212.50x = 7,259,466,006.25
5. Step 5: Solve for x
   x = 7,259,466,006.25/64,212.50
6. Step 6: Final answer
   x = 113,053.78