Finding the Third Proportional to 31,261.50 and 64,712.25

Step by Step Solution

1. Step 1: Write the proportion equation
   31,261.50 : 64,712.25 = 64,712.25 : x
2. Step 2: Convert to fraction form
   31,261.50/64,712.25 = 64,712.25/x
3. Step 3: Cross multiply
   31,261.50x = 64,712.25 × 64,712.25
4. Step 4: Simplify right side
   31,261.50x = 4,187,675,300.06
5. Step 5: Solve for x
   x = 4,187,675,300.06/31,261.50
6. Step 6: Final answer
   x = 133,956.31