Finding the Third Proportional to 54,868.50 and 87,257.25

Step by Step Solution

1. Step 1: Write the proportion equation
   54,868.50 : 87,257.25 = 87,257.25 : x
2. Step 2: Convert to fraction form
   54,868.50/87,257.25 = 87,257.25/x
3. Step 3: Cross multiply
   54,868.50x = 87,257.25 × 87,257.25
4. Step 4: Simplify right side
   54,868.50x = 7,613,827,677.56
5. Step 5: Solve for x
   x = 7,613,827,677.56/54,868.50
6. Step 6: Final answer
   x = 138,765.01