Finding the Third Proportional to 39,449.25 and 81,809.75

Step by Step Solution

1. Step 1: Write the proportion equation
   39,449.25 : 81,809.75 = 81,809.75 : x
2. Step 2: Convert to fraction form
   39,449.25/81,809.75 = 81,809.75/x
3. Step 3: Cross multiply
   39,449.25x = 81,809.75 × 81,809.75
4. Step 4: Simplify right side
   39,449.25x = 6,692,835,195.06
5. Step 5: Solve for x
   x = 6,692,835,195.06/39,449.25
6. Step 6: Final answer
   x = 169,656.84