Finding the Third Proportional to 100,436.50 and 209,195

Step by Step Solution

1. Step 1: Write the proportion equation
   100,436.50 : 209,195 = 209,195 : x
2. Step 2: Convert to fraction form
   100,436.50/209,195 = 209,195/x
3. Step 3: Cross multiply
   100,436.50x = 209,195 × 209,195
4. Step 4: Simplify right side
   100,436.50x = 43,762,548,025
5. Step 5: Solve for x
   x = 43,762,548,025/100,436.50
6. Step 6: Final answer
   x = 435,723.55