Finding the Third Proportional to 54,585.75 and 86,799.38

Step by Step Solution

1. Step 1: Write the proportion equation
   54,585.75 : 86,799.38 = 86,799.38 : x
2. Step 2: Convert to fraction form
   54,585.75/86,799.38 = 86,799.38/x
3. Step 3: Cross multiply
   54,585.75x = 86,799.38 × 86,799.38
4. Step 4: Simplify right side
   54,585.75x = 7,534,131,500.39
5. Step 5: Solve for x
   x = 7,534,131,500.39/54,585.75
6. Step 6: Final answer
   x = 138,023.78