Finding the Third Proportional to 203,505 and 311,305.50

Step by Step Solution

1. Step 1: Write the proportion equation
   203,505 : 311,305.50 = 311,305.50 : x
2. Step 2: Convert to fraction form
   203,505/311,305.50 = 311,305.50/x
3. Step 3: Cross multiply
   203,505x = 311,305.50 × 311,305.50
4. Step 4: Simplify right side
   203,505x = 96,911,114,330.25
5. Step 5: Solve for x
   x = 96,911,114,330.25/203,505
6. Step 6: Final answer
   x = 476,209.99