Finding the Third Proportional to 31,560.57 and 68,768.05

Step by Step Solution

1. Step 1: Write the proportion equation
   31,560.57 : 68,768.05 = 68,768.05 : x
2. Step 2: Convert to fraction form
   31,560.57/68,768.05 = 68,768.05/x
3. Step 3: Cross multiply
   31,560.57x = 68,768.05 × 68,768.05
4. Step 4: Simplify right side
   31,560.57x = 4,729,044,808.25
5. Step 5: Solve for x
   x = 4,729,044,808.25/31,560.57
6. Step 6: Final answer
   x = 149,840.27