Finding the Third Proportional to 55,223.25 and 86,388.75

Step by Step Solution

1. Step 1: Write the proportion equation
   55,223.25 : 86,388.75 = 86,388.75 : x
2. Step 2: Convert to fraction form
   55,223.25/86,388.75 = 86,388.75/x
3. Step 3: Cross multiply
   55,223.25x = 86,388.75 × 86,388.75
4. Step 4: Simplify right side
   55,223.25x = 7,463,016,126.56
5. Step 5: Solve for x
   x = 7,463,016,126.56/55,223.25
6. Step 6: Final answer
   x = 135,142.65