Finding the Third Proportional to 31,078 and 67,672

Step by Step Solution

1. Step 1: Write the proportion equation
   31,078 : 67,672 = 67,672 : x
2. Step 2: Convert to fraction form
   31,078/67,672 = 67,672/x
3. Step 3: Cross multiply
   31,078x = 67,672 × 67,672
4. Step 4: Simplify right side
   31,078x = 4,579,499,584
5. Step 5: Solve for x
   x = 4,579,499,584/31,078
6. Step 6: Final answer
   x = 147,355.03