Finding the Third Proportional to 123,860 and 172,342

Step by Step Solution

1. Step 1: Write the proportion equation
   123,860 : 172,342 = 172,342 : x
2. Step 2: Convert to fraction form
   123,860/172,342 = 172,342/x
3. Step 3: Cross multiply
   123,860x = 172,342 × 172,342
4. Step 4: Simplify right side
   123,860x = 29,701,764,964
5. Step 5: Solve for x
   x = 29,701,764,964/123,860
6. Step 6: Final answer
   x = 239,801.11