Finding the Third Proportional to 140,112 and 311,328

Step by Step Solution

1. Step 1: Write the proportion equation
   140,112 : 311,328 = 311,328 : x
2. Step 2: Convert to fraction form
   140,112/311,328 = 311,328/x
3. Step 3: Cross multiply
   140,112x = 311,328 × 311,328
4. Step 4: Simplify right side
   140,112x = 96,925,123,584
5. Step 5: Solve for x
   x = 96,925,123,584/140,112
6. Step 6: Final answer
   x = 691,768.90