Finding the Third Proportional to 103,619.50 and 221,940.50

Step by Step Solution

1. Step 1: Write the proportion equation
   103,619.50 : 221,940.50 = 221,940.50 : x
2. Step 2: Convert to fraction form
   103,619.50/221,940.50 = 221,940.50/x
3. Step 3: Cross multiply
   103,619.50x = 221,940.50 × 221,940.50
4. Step 4: Simplify right side
   103,619.50x = 49,257,585,540.25
5. Step 5: Solve for x
   x = 49,257,585,540.25/103,619.50
6. Step 6: Final answer
   x = 475,369.84