Finding the Third Proportional to 19,928 and 42,286

Step by Step Solution

1. Step 1: Write the proportion equation
   19,928 : 42,286 = 42,286 : x
2. Step 2: Convert to fraction form
   19,928/42,286 = 42,286/x
3. Step 3: Cross multiply
   19,928x = 42,286 × 42,286
4. Step 4: Simplify right side
   19,928x = 1,788,105,796
5. Step 5: Solve for x
   x = 1,788,105,796/19,928
6. Step 6: Final answer
   x = 89,728.31