Finding the Third Proportional to 67,678.50 and 99,208.50

Step by Step Solution

1. Step 1: Write the proportion equation
   67,678.50 : 99,208.50 = 99,208.50 : x
2. Step 2: Convert to fraction form
   67,678.50/99,208.50 = 99,208.50/x
3. Step 3: Cross multiply
   67,678.50x = 99,208.50 × 99,208.50
4. Step 4: Simplify right side
   67,678.50x = 9,842,326,472.25
5. Step 5: Solve for x
   x = 9,842,326,472.25/67,678.50
6. Step 6: Final answer
   x = 145,427.67