Finding the Third Proportional to 31,609.50 and 67,317

Step by Step Solution

1. Step 1: Write the proportion equation
   31,609.50 : 67,317 = 67,317 : x
2. Step 2: Convert to fraction form
   31,609.50/67,317 = 67,317/x
3. Step 3: Cross multiply
   31,609.50x = 67,317 × 67,317
4. Step 4: Simplify right side
   31,609.50x = 4,531,578,489
5. Step 5: Solve for x
   x = 4,531,578,489/31,609.50
6. Step 6: Final answer
   x = 143,361.28