Finding the Third Proportional to 100,568.50 and 209,480

Step by Step Solution

1. Step 1: Write the proportion equation
   100,568.50 : 209,480 = 209,480 : x
2. Step 2: Convert to fraction form
   100,568.50/209,480 = 209,480/x
3. Step 3: Cross multiply
   100,568.50x = 209,480 × 209,480
4. Step 4: Simplify right side
   100,568.50x = 43,881,870,400
5. Step 5: Solve for x
   x = 43,881,870,400/100,568.50
6. Step 6: Final answer
   x = 436,338.12