Finding the Third Proportional to 311,929.50 and 434,610

Step by Step Solution

1. Step 1: Write the proportion equation
   311,929.50 : 434,610 = 434,610 : x
2. Step 2: Convert to fraction form
   311,929.50/434,610 = 434,610/x
3. Step 3: Cross multiply
   311,929.50x = 434,610 × 434,610
4. Step 4: Simplify right side
   311,929.50x = 188,885,852,100
5. Step 5: Solve for x
   x = 188,885,852,100/311,929.50
6. Step 6: Final answer
   x = 605,540.20