Finding the Third Proportional to 55,320 and 86,436

Step by Step Solution

1. Step 1: Write the proportion equation
   55,320 : 86,436 = 86,436 : x
2. Step 2: Convert to fraction form
   55,320/86,436 = 86,436/x
3. Step 3: Cross multiply
   55,320x = 86,436 × 86,436
4. Step 4: Simplify right side
   55,320x = 7,471,182,096
5. Step 5: Solve for x
   x = 7,471,182,096/55,320
6. Step 6: Final answer
   x = 135,053.91