Finding the Third Proportional to 31,615.50 and 67,715

Step by Step Solution

1. Step 1: Write the proportion equation
   31,615.50 : 67,715 = 67,715 : x
2. Step 2: Convert to fraction form
   31,615.50/67,715 = 67,715/x
3. Step 3: Cross multiply
   31,615.50x = 67,715 × 67,715
4. Step 4: Simplify right side
   31,615.50x = 4,585,321,225
5. Step 5: Solve for x
   x = 4,585,321,225/31,615.50
6. Step 6: Final answer
   x = 145,033.96