Finding the Third Proportional to 61,178.25 and 86,153.25

Step by Step Solution

1. Step 1: Write the proportion equation
   61,178.25 : 86,153.25 = 86,153.25 : x
2. Step 2: Convert to fraction form
   61,178.25/86,153.25 = 86,153.25/x
3. Step 3: Cross multiply
   61,178.25x = 86,153.25 × 86,153.25
4. Step 4: Simplify right side
   61,178.25x = 7,422,382,485.56
5. Step 5: Solve for x
   x = 7,422,382,485.56/61,178.25
6. Step 6: Final answer
   x = 121,323.88