Finding the Third Proportional to 172,436 and 267,620

Step by Step Solution

1. Step 1: Write the proportion equation
   172,436 : 267,620 = 267,620 : x
2. Step 2: Convert to fraction form
   172,436/267,620 = 267,620/x
3. Step 3: Cross multiply
   172,436x = 267,620 × 267,620
4. Step 4: Simplify right side
   172,436x = 71,620,464,400
5. Step 5: Solve for x
   x = 71,620,464,400/172,436
6. Step 6: Final answer
   x = 415,345.20