Finding the Third Proportional to 31,421.25 and 65,940.75

Step by Step Solution

1. Step 1: Write the proportion equation
   31,421.25 : 65,940.75 = 65,940.75 : x
2. Step 2: Convert to fraction form
   31,421.25/65,940.75 = 65,940.75/x
3. Step 3: Cross multiply
   31,421.25x = 65,940.75 × 65,940.75
4. Step 4: Simplify right side
   31,421.25x = 4,348,182,510.56
5. Step 5: Solve for x
   x = 4,348,182,510.56/31,421.25
6. Step 6: Final answer
   x = 138,383.50