Finding the Third Proportional to 128,529 and 200,998.50

Step by Step Solution

1. Step 1: Write the proportion equation
   128,529 : 200,998.50 = 200,998.50 : x
2. Step 2: Convert to fraction form
   128,529/200,998.50 = 200,998.50/x
3. Step 3: Cross multiply
   128,529x = 200,998.50 × 200,998.50
4. Step 4: Simplify right side
   128,529x = 40,400,397,002.25
5. Step 5: Solve for x
   x = 40,400,397,002.25/128,529
6. Step 6: Final answer
   x = 314,329.04