Finding the Third Proportional to 21,400 and 28,402

Step by Step Solution

1. Step 1: Write the proportion equation
   21,400 : 28,402 = 28,402 : x
2. Step 2: Convert to fraction form
   21,400/28,402 = 28,402/x
3. Step 3: Cross multiply
   21,400x = 28,402 × 28,402
4. Step 4: Simplify right side
   21,400x = 806,673,604
5. Step 5: Solve for x
   x = 806,673,604/21,400
6. Step 6: Final answer
   x = 37,695.03