Finding the Third Proportional to 9,172 and 19,912

Step by Step Solution

1. Step 1: Write the proportion equation
   9,172 : 19,912 = 19,912 : x
2. Step 2: Convert to fraction form
   9,172/19,912 = 19,912/x
3. Step 3: Cross multiply
   9,172x = 19,912 × 19,912
4. Step 4: Simplify right side
   9,172x = 396,487,744
5. Step 5: Solve for x
   x = 396,487,744/9,172
6. Step 6: Final answer
   x = 43,228.06