Finding the Third Proportional to 67,689 and 99,222.75

Step by Step Solution

1. Step 1: Write the proportion equation
   67,689 : 99,222.75 = 99,222.75 : x
2. Step 2: Convert to fraction form
   67,689/99,222.75 = 99,222.75/x
3. Step 3: Cross multiply
   67,689x = 99,222.75 × 99,222.75
4. Step 4: Simplify right side
   67,689x = 9,845,154,117.56
5. Step 5: Solve for x
   x = 9,845,154,117.56/67,689
6. Step 6: Final answer
   x = 145,446.88