Finding the Third Proportional to 8,856 and 21,429

Step by Step Solution

1. Step 1: Write the proportion equation
   8,856 : 21,429 = 21,429 : x
2. Step 2: Convert to fraction form
   8,856/21,429 = 21,429/x
3. Step 3: Cross multiply
   8,856x = 21,429 × 21,429
4. Step 4: Simplify right side
   8,856x = 459,202,041
5. Step 5: Solve for x
   x = 459,202,041/8,856
6. Step 6: Final answer
   x = 51,852.08