Finding the Third Proportional to 31,428 and 71,073

Step by Step Solution

1. Step 1: Write the proportion equation
   31,428 : 71,073 = 71,073 : x
2. Step 2: Convert to fraction form
   31,428/71,073 = 71,073/x
3. Step 3: Cross multiply
   31,428x = 71,073 × 71,073
4. Step 4: Simplify right side
   31,428x = 5,051,371,329
5. Step 5: Solve for x
   x = 5,051,371,329/31,428
6. Step 6: Final answer
   x = 160,728.37