Finding the Third Proportional to 9,142 and 21,559

Step by Step Solution

1. Step 1: Write the proportion equation
   9,142 : 21,559 = 21,559 : x
2. Step 2: Convert to fraction form
   9,142/21,559 = 21,559/x
3. Step 3: Cross multiply
   9,142x = 21,559 × 21,559
4. Step 4: Simplify right side
   9,142x = 464,790,481
5. Step 5: Solve for x
   x = 464,790,481/9,142
6. Step 6: Final answer
   x = 50,841.23