Finding the Third Proportional to 99,053.75 and 206,315.50

Step by Step Solution

1. Step 1: Write the proportion equation
   99,053.75 : 206,315.50 = 206,315.50 : x
2. Step 2: Convert to fraction form
   99,053.75/206,315.50 = 206,315.50/x
3. Step 3: Cross multiply
   99,053.75x = 206,315.50 × 206,315.50
4. Step 4: Simplify right side
   99,053.75x = 42,566,085,540.25
5. Step 5: Solve for x
   x = 42,566,085,540.25/99,053.75
6. Step 6: Final answer
   x = 429,727.15