Finding the Third Proportional to 30,910 and 67,328

Step by Step Solution

1. Step 1: Write the proportion equation
   30,910 : 67,328 = 67,328 : x
2. Step 2: Convert to fraction form
   30,910/67,328 = 67,328/x
3. Step 3: Cross multiply
   30,910x = 67,328 × 67,328
4. Step 4: Simplify right side
   30,910x = 4,533,059,584
5. Step 5: Solve for x
   x = 4,533,059,584/30,910
6. Step 6: Final answer
   x = 146,653.50