Finding the Third Proportional to 31,378.50 and 68,976.56

Step by Step Solution

1. Step 1: Write the proportion equation
   31,378.50 : 68,976.56 = 68,976.56 : x
2. Step 2: Convert to fraction form
   31,378.50/68,976.56 = 68,976.56/x
3. Step 3: Cross multiply
   31,378.50x = 68,976.56 × 68,976.56
4. Step 4: Simplify right side
   31,378.50x = 4,757,766,174.32
5. Step 5: Solve for x
   x = 4,757,766,174.32/31,378.50
6. Step 6: Final answer
   x = 151,625.04