Finding the Third Proportional to 131,931 and 311,128

Step by Step Solution

1. Step 1: Write the proportion equation
   131,931 : 311,128 = 311,128 : x
2. Step 2: Convert to fraction form
   131,931/311,128 = 311,128/x
3. Step 3: Cross multiply
   131,931x = 311,128 × 311,128
4. Step 4: Simplify right side
   131,931x = 96,800,632,384
5. Step 5: Solve for x
   x = 96,800,632,384/131,931
6. Step 6: Final answer
   x = 733,721.66