Finding the Third Proportional to 311,176.69 and 633,766.78

Step by Step Solution

1. Step 1: Write the proportion equation
   311,176.69 : 633,766.78 = 633,766.78 : x
2. Step 2: Convert to fraction form
   311,176.69/633,766.78 = 633,766.78/x
3. Step 3: Cross multiply
   311,176.69x = 633,766.78 × 633,766.78
4. Step 4: Simplify right side
   311,176.69x = 401,660,333,015.99
5. Step 5: Solve for x
   x = 401,660,333,015.99/311,176.69
6. Step 6: Final answer
   x = 1,290,779.00