Finding the Third Proportional to 42,842.25 and 86,722.31

Step by Step Solution

1. Step 1: Write the proportion equation
   42,842.25 : 86,722.31 = 86,722.31 : x
2. Step 2: Convert to fraction form
   42,842.25/86,722.31 = 86,722.31/x
3. Step 3: Cross multiply
   42,842.25x = 86,722.31 × 86,722.31
4. Step 4: Simplify right side
   42,842.25x = 7,520,759,485.35
5. Step 5: Solve for x
   x = 7,520,759,485.35/42,842.25
6. Step 6: Final answer
   x = 175,545.39