Finding the Third Proportional to 54,059.91 and 86,086.55

Step by Step Solution

1. Step 1: Write the proportion equation
   54,059.91 : 86,086.55 = 86,086.55 : x
2. Step 2: Convert to fraction form
   54,059.91/86,086.55 = 86,086.55/x
3. Step 3: Cross multiply
   54,059.91x = 86,086.55 × 86,086.55
4. Step 4: Simplify right side
   54,059.91x = 7,410,893,552.86
5. Step 5: Solve for x
   x = 7,410,893,552.86/54,059.91
6. Step 6: Final answer
   x = 137,086.69