Finding the Third Proportional to 39,879 and 59,049

Step by Step Solution

1. Step 1: Write the proportion equation
   39,879 : 59,049 = 59,049 : x
2. Step 2: Convert to fraction form
   39,879/59,049 = 59,049/x
3. Step 3: Cross multiply
   39,879x = 59,049 × 59,049
4. Step 4: Simplify right side
   39,879x = 3,486,784,401
5. Step 5: Solve for x
   x = 3,486,784,401/39,879
6. Step 6: Final answer
   x = 87,434.10