Finding the Third Proportional to 128,850 and 200,382

Step by Step Solution

1. Step 1: Write the proportion equation
   128,850 : 200,382 = 200,382 : x
2. Step 2: Convert to fraction form
   128,850/200,382 = 200,382/x
3. Step 3: Cross multiply
   128,850x = 200,382 × 200,382
4. Step 4: Simplify right side
   128,850x = 40,152,945,924
5. Step 5: Solve for x
   x = 40,152,945,924/128,850
6. Step 6: Final answer
   x = 311,625.50