Finding the Third Proportional to 31,331.25 and 64,739.25

Step by Step Solution

1. Step 1: Write the proportion equation
   31,331.25 : 64,739.25 = 64,739.25 : x
2. Step 2: Convert to fraction form
   31,331.25/64,739.25 = 64,739.25/x
3. Step 3: Cross multiply
   31,331.25x = 64,739.25 × 64,739.25
4. Step 4: Simplify right side
   31,331.25x = 4,191,170,490.56
5. Step 5: Solve for x
   x = 4,191,170,490.56/31,331.25
6. Step 6: Final answer
   x = 133,769.65