Finding the Third Proportional to 31,260 and 68,239.50

Step by Step Solution

1. Step 1: Write the proportion equation
   31,260 : 68,239.50 = 68,239.50 : x
2. Step 2: Convert to fraction form
   31,260/68,239.50 = 68,239.50/x
3. Step 3: Cross multiply
   31,260x = 68,239.50 × 68,239.50
4. Step 4: Simplify right side
   31,260x = 4,656,629,360.25
5. Step 5: Solve for x
   x = 4,656,629,360.25/31,260
6. Step 6: Final answer
   x = 148,964.47