Finding the Third Proportional to 128,752 and 200,264

Step by Step Solution

1. Step 1: Write the proportion equation
   128,752 : 200,264 = 200,264 : x
2. Step 2: Convert to fraction form
   128,752/200,264 = 200,264/x
3. Step 3: Cross multiply
   128,752x = 200,264 × 200,264
4. Step 4: Simplify right side
   128,752x = 40,105,669,696
5. Step 5: Solve for x
   x = 40,105,669,696/128,752
6. Step 6: Final answer
   x = 311,495.51