Finding the Third Proportional to 31,287.75 and 73,217.25

Step by Step Solution

1. Step 1: Write the proportion equation
   31,287.75 : 73,217.25 = 73,217.25 : x
2. Step 2: Convert to fraction form
   31,287.75/73,217.25 = 73,217.25/x
3. Step 3: Cross multiply
   31,287.75x = 73,217.25 × 73,217.25
4. Step 4: Simplify right side
   31,287.75x = 5,360,765,697.56
5. Step 5: Solve for x
   x = 5,360,765,697.56/31,287.75
6. Step 6: Final answer
   x = 171,337.53