Finding the Third Proportional to 31,108 and 67,130

Step by Step Solution

1. Step 1: Write the proportion equation
   31,108 : 67,130 = 67,130 : x
2. Step 2: Convert to fraction form
   31,108/67,130 = 67,130/x
3. Step 3: Cross multiply
   31,108x = 67,130 × 67,130
4. Step 4: Simplify right side
   31,108x = 4,506,436,900
5. Step 5: Solve for x
   x = 4,506,436,900/31,108
6. Step 6: Final answer
   x = 144,864.24