Finding the Third Proportional to 31,378.22 and 68,975.72

Step by Step Solution

1. Step 1: Write the proportion equation
   31,378.22 : 68,975.72 = 68,975.72 : x
2. Step 2: Convert to fraction form
   31,378.22/68,975.72 = 68,975.72/x
3. Step 3: Cross multiply
   31,378.22x = 68,975.72 × 68,975.72
4. Step 4: Simplify right side
   31,378.22x = 4,757,649,777.08
5. Step 5: Solve for x
   x = 4,757,649,777.08/31,378.22
6. Step 6: Final answer
   x = 151,622.68