Finding the Third Proportional to 55,238.25 and 86,412

Step by Step Solution

1. Step 1: Write the proportion equation
   55,238.25 : 86,412 = 86,412 : x
2. Step 2: Convert to fraction form
   55,238.25/86,412 = 86,412/x
3. Step 3: Cross multiply
   55,238.25x = 86,412 × 86,412
4. Step 4: Simplify right side
   55,238.25x = 7,467,033,744
5. Step 5: Solve for x
   x = 7,467,033,744/55,238.25
6. Step 6: Final answer
   x = 135,178.68