Finding the Third Proportional to 17,838 and 20,430

Step by Step Solution

1. Step 1: Write the proportion equation
   17,838 : 20,430 = 20,430 : x
2. Step 2: Convert to fraction form
   17,838/20,430 = 20,430/x
3. Step 3: Cross multiply
   17,838x = 20,430 × 20,430
4. Step 4: Simplify right side
   17,838x = 417,384,900
5. Step 5: Solve for x
   x = 417,384,900/17,838
6. Step 6: Final answer
   x = 23,398.64