Finding the Third Proportional to 31,210.50 and 67,605

Step by Step Solution

1. Step 1: Write the proportion equation
   31,210.50 : 67,605 = 67,605 : x
2. Step 2: Convert to fraction form
   31,210.50/67,605 = 67,605/x
3. Step 3: Cross multiply
   31,210.50x = 67,605 × 67,605
4. Step 4: Simplify right side
   31,210.50x = 4,570,436,025
5. Step 5: Solve for x
   x = 4,570,436,025/31,210.50
6. Step 6: Final answer
   x = 146,439.05