Finding the Third Proportional to 54,587.25 and 86,805

Step by Step Solution

1. Step 1: Write the proportion equation
   54,587.25 : 86,805 = 86,805 : x
2. Step 2: Convert to fraction form
   54,587.25/86,805 = 86,805/x
3. Step 3: Cross multiply
   54,587.25x = 86,805 × 86,805
4. Step 4: Simplify right side
   54,587.25x = 7,535,108,025
5. Step 5: Solve for x
   x = 7,535,108,025/54,587.25
6. Step 6: Final answer
   x = 138,037.88