Finding the Third Proportional to 111,422 and 173,909

Step by Step Solution

1. Step 1: Write the proportion equation
   111,422 : 173,909 = 173,909 : x
2. Step 2: Convert to fraction form
   111,422/173,909 = 173,909/x
3. Step 3: Cross multiply
   111,422x = 173,909 × 173,909
4. Step 4: Simplify right side
   111,422x = 30,244,340,281
5. Step 5: Solve for x
   x = 30,244,340,281/111,422
6. Step 6: Final answer
   x = 271,439.57