Finding the Third Proportional to 311,701.50 and 673,245

Step by Step Solution

1. Step 1: Write the proportion equation
   311,701.50 : 673,245 = 673,245 : x
2. Step 2: Convert to fraction form
   311,701.50/673,245 = 673,245/x
3. Step 3: Cross multiply
   311,701.50x = 673,245 × 673,245
4. Step 4: Simplify right side
   311,701.50x = 453,258,830,025
5. Step 5: Solve for x
   x = 453,258,830,025/311,701.50
6. Step 6: Final answer
   x = 1,454,143.88