Finding the Third Proportional to 67,681.50 and 99,213.75

Step by Step Solution

1. Step 1: Write the proportion equation
   67,681.50 : 99,213.75 = 99,213.75 : x
2. Step 2: Convert to fraction form
   67,681.50/99,213.75 = 99,213.75/x
3. Step 3: Cross multiply
   67,681.50x = 99,213.75 × 99,213.75
4. Step 4: Simplify right side
   67,681.50x = 9,843,368,189.06
5. Step 5: Solve for x
   x = 9,843,368,189.06/67,681.50
6. Step 6: Final answer
   x = 145,436.61