Finding the Third Proportional to 20,011.78 and 42,227.58

Step by Step Solution

1. Step 1: Write the proportion equation
   20,011.78 : 42,227.58 = 42,227.58 : x
2. Step 2: Convert to fraction form
   20,011.78/42,227.58 = 42,227.58/x
3. Step 3: Cross multiply
   20,011.78x = 42,227.58 × 42,227.58
4. Step 4: Simplify right side
   20,011.78x = 1,783,168,354.30
5. Step 5: Solve for x
   x = 1,783,168,354.30/20,011.78
6. Step 6: Final answer
   x = 89,105.93