Finding the Third Proportional to 31,450 and 68,840

Step by Step Solution

1. Step 1: Write the proportion equation
   31,450 : 68,840 = 68,840 : x
2. Step 2: Convert to fraction form
   31,450/68,840 = 68,840/x
3. Step 3: Cross multiply
   31,450x = 68,840 × 68,840
4. Step 4: Simplify right side
   31,450x = 4,738,945,600
5. Step 5: Solve for x
   x = 4,738,945,600/31,450
6. Step 6: Final answer
   x = 150,681.90