Finding the Third Proportional to 2,011.50 and 4,215.28

Step by Step Solution

1. Step 1: Write the proportion equation
   2,011.50 : 4,215.28 = 4,215.28 : x
2. Step 2: Convert to fraction form
   2,011.50/4,215.28 = 4,215.28/x
3. Step 3: Cross multiply
   2,011.50x = 4,215.28 × 4,215.28
4. Step 4: Simplify right side
   2,011.50x = 17,768,596.02
5. Step 5: Solve for x
   x = 17,768,596.02/2,011.50
6. Step 6: Final answer
   x = 8,833.51