Finding the Third Proportional to 203,860 and 311,115.50

Step by Step Solution

1. Step 1: Write the proportion equation
   203,860 : 311,115.50 = 311,115.50 : x
2. Step 2: Convert to fraction form
   203,860/311,115.50 = 311,115.50/x
3. Step 3: Cross multiply
   203,860x = 311,115.50 × 311,115.50
4. Step 4: Simplify right side
   203,860x = 96,792,854,340.25
5. Step 5: Solve for x
   x = 96,792,854,340.25/203,860
6. Step 6: Final answer
   x = 474,800.62