Finding the Third Proportional to 31,509.56 and 65,940.19

Step by Step Solution

1. Step 1: Write the proportion equation
   31,509.56 : 65,940.19 = 65,940.19 : x
2. Step 2: Convert to fraction form
   31,509.56/65,940.19 = 65,940.19/x
3. Step 3: Cross multiply
   31,509.56x = 65,940.19 × 65,940.19
4. Step 4: Simplify right side
   31,509.56x = 4,348,108,327.54
5. Step 5: Solve for x
   x = 4,348,108,327.54/31,509.56
6. Step 6: Final answer
   x = 137,993.29