Finding the Third Proportional to 19,890 and 28,274

Step by Step Solution

1. Step 1: Write the proportion equation
   19,890 : 28,274 = 28,274 : x
2. Step 2: Convert to fraction form
   19,890/28,274 = 28,274/x
3. Step 3: Cross multiply
   19,890x = 28,274 × 28,274
4. Step 4: Simplify right side
   19,890x = 799,419,076
5. Step 5: Solve for x
   x = 799,419,076/19,890
6. Step 6: Final answer
   x = 40,192.01