Finding the Third Proportional to 54,215 and 86,250

Step by Step Solution

1. Step 1: Write the proportion equation
   54,215 : 86,250 = 86,250 : x
2. Step 2: Convert to fraction form
   54,215/86,250 = 86,250/x
3. Step 3: Cross multiply
   54,215x = 86,250 × 86,250
4. Step 4: Simplify right side
   54,215x = 7,439,062,500
5. Step 5: Solve for x
   x = 7,439,062,500/54,215
6. Step 6: Final answer
   x = 137,214.10