Finding the Third Proportional to 54,600.75 and 86,818.50

Step by Step Solution

1. Step 1: Write the proportion equation
   54,600.75 : 86,818.50 = 86,818.50 : x
2. Step 2: Convert to fraction form
   54,600.75/86,818.50 = 86,818.50/x
3. Step 3: Cross multiply
   54,600.75x = 86,818.50 × 86,818.50
4. Step 4: Simplify right side
   54,600.75x = 7,537,451,942.25
5. Step 5: Solve for x
   x = 7,537,451,942.25/54,600.75
6. Step 6: Final answer
   x = 138,046.67