Finding the Third Proportional to 67,689 and 99,571.50

Step by Step Solution

1. Step 1: Write the proportion equation
   67,689 : 99,571.50 = 99,571.50 : x
2. Step 2: Convert to fraction form
   67,689/99,571.50 = 99,571.50/x
3. Step 3: Cross multiply
   67,689x = 99,571.50 × 99,571.50
4. Step 4: Simplify right side
   67,689x = 9,914,483,612.25
5. Step 5: Solve for x
   x = 9,914,483,612.25/67,689
6. Step 6: Final answer
   x = 146,471.12