Finding the Third Proportional to 61,198.50 and 86,179.50

Step by Step Solution

1. Step 1: Write the proportion equation
   61,198.50 : 86,179.50 = 86,179.50 : x
2. Step 2: Convert to fraction form
   61,198.50/86,179.50 = 86,179.50/x
3. Step 3: Cross multiply
   61,198.50x = 86,179.50 × 86,179.50
4. Step 4: Simplify right side
   61,198.50x = 7,426,906,220.25
5. Step 5: Solve for x
   x = 7,426,906,220.25/61,198.50
6. Step 6: Final answer
   x = 121,357.65