Finding the Third Proportional to 31,160 and 67,310

Step by Step Solution

1. Step 1: Write the proportion equation
   31,160 : 67,310 = 67,310 : x
2. Step 2: Convert to fraction form
   31,160/67,310 = 67,310/x
3. Step 3: Cross multiply
   31,160x = 67,310 × 67,310
4. Step 4: Simplify right side
   31,160x = 4,530,636,100
5. Step 5: Solve for x
   x = 4,530,636,100/31,160
6. Step 6: Final answer
   x = 145,399.10