Finding the Third Proportional to 31,243 and 67,103

Step by Step Solution

1. Step 1: Write the proportion equation
   31,243 : 67,103 = 67,103 : x
2. Step 2: Convert to fraction form
   31,243/67,103 = 67,103/x
3. Step 3: Cross multiply
   31,243x = 67,103 × 67,103
4. Step 4: Simplify right side
   31,243x = 4,502,812,609
5. Step 5: Solve for x
   x = 4,502,812,609/31,243
6. Step 6: Final answer
   x = 144,122.29