Finding the Third Proportional to 200,055.75 and 309,669

Step by Step Solution

1. Step 1: Write the proportion equation
   200,055.75 : 309,669 = 309,669 : x
2. Step 2: Convert to fraction form
   200,055.75/309,669 = 309,669/x
3. Step 3: Cross multiply
   200,055.75x = 309,669 × 309,669
4. Step 4: Simplify right side
   200,055.75x = 95,894,889,561
5. Step 5: Solve for x
   x = 95,894,889,561/200,055.75
6. Step 6: Final answer
   x = 479,340.83