Finding the Third Proportional to 31,224 and 67,740

Step by Step Solution

1. Step 1: Write the proportion equation
   31,224 : 67,740 = 67,740 : x
2. Step 2: Convert to fraction form
   31,224/67,740 = 67,740/x
3. Step 3: Cross multiply
   31,224x = 67,740 × 67,740
4. Step 4: Simplify right side
   31,224x = 4,588,707,600
5. Step 5: Solve for x
   x = 4,588,707,600/31,224
6. Step 6: Final answer
   x = 146,960.91