Finding the Third Proportional to 79,068 and 172,920

Step by Step Solution

1. Step 1: Write the proportion equation
   79,068 : 172,920 = 172,920 : x
2. Step 2: Convert to fraction form
   79,068/172,920 = 172,920/x
3. Step 3: Cross multiply
   79,068x = 172,920 × 172,920
4. Step 4: Simplify right side
   79,068x = 29,901,326,400
5. Step 5: Solve for x
   x = 29,901,326,400/79,068
6. Step 6: Final answer
   x = 378,172.29