Finding the Third Proportional to 54,156 and 86,496

Step by Step Solution

1. Step 1: Write the proportion equation
   54,156 : 86,496 = 86,496 : x
2. Step 2: Convert to fraction form
   54,156/86,496 = 86,496/x
3. Step 3: Cross multiply
   54,156x = 86,496 × 86,496
4. Step 4: Simplify right side
   54,156x = 7,481,558,016
5. Step 5: Solve for x
   x = 7,481,558,016/54,156
6. Step 6: Final answer
   x = 138,148.28