Finding the Third Proportional to 101,800 and 218,648

Step by Step Solution

1. Step 1: Write the proportion equation
   101,800 : 218,648 = 218,648 : x
2. Step 2: Convert to fraction form
   101,800/218,648 = 218,648/x
3. Step 3: Cross multiply
   101,800x = 218,648 × 218,648
4. Step 4: Simplify right side
   101,800x = 47,806,947,904
5. Step 5: Solve for x
   x = 47,806,947,904/101,800
6. Step 6: Final answer
   x = 469,616.38