Finding the Third Proportional to 31,288.50 and 68,105.25

Step by Step Solution

1. Step 1: Write the proportion equation
   31,288.50 : 68,105.25 = 68,105.25 : x
2. Step 2: Convert to fraction form
   31,288.50/68,105.25 = 68,105.25/x
3. Step 3: Cross multiply
   31,288.50x = 68,105.25 × 68,105.25
4. Step 4: Simplify right side
   31,288.50x = 4,638,325,077.56
5. Step 5: Solve for x
   x = 4,638,325,077.56/31,288.50
6. Step 6: Final answer
   x = 148,243.77