Finding the Third Proportional to 311,756 and 672,158.50

Step by Step Solution

1. Step 1: Write the proportion equation
   311,756 : 672,158.50 = 672,158.50 : x
2. Step 2: Convert to fraction form
   311,756/672,158.50 = 672,158.50/x
3. Step 3: Cross multiply
   311,756x = 672,158.50 × 672,158.50
4. Step 4: Simplify right side
   311,756x = 451,797,049,122.25
5. Step 5: Solve for x
   x = 451,797,049,122.25/311,756
6. Step 6: Final answer
   x = 1,449,200.81