Finding the Third Proportional to 67,688.50 and 99,223.50

Step by Step Solution

1. Step 1: Write the proportion equation
   67,688.50 : 99,223.50 = 99,223.50 : x
2. Step 2: Convert to fraction form
   67,688.50/99,223.50 = 99,223.50/x
3. Step 3: Cross multiply
   67,688.50x = 99,223.50 × 99,223.50
4. Step 4: Simplify right side
   67,688.50x = 9,845,302,952.25
5. Step 5: Solve for x
   x = 9,845,302,952.25/67,688.50
6. Step 6: Final answer
   x = 145,450.16