Finding the Third Proportional to 42,920 and 103,388

Step by Step Solution

1. Step 1: Write the proportion equation
   42,920 : 103,388 = 103,388 : x
2. Step 2: Convert to fraction form
   42,920/103,388 = 103,388/x
3. Step 3: Cross multiply
   42,920x = 103,388 × 103,388
4. Step 4: Simplify right side
   42,920x = 10,689,078,544
5. Step 5: Solve for x
   x = 10,689,078,544/42,920
6. Step 6: Final answer
   x = 249,046.56