Finding the Third Proportional to 311,733.50 and 670,087

Step by Step Solution

1. Step 1: Write the proportion equation
   311,733.50 : 670,087 = 670,087 : x
2. Step 2: Convert to fraction form
   311,733.50/670,087 = 670,087/x
3. Step 3: Cross multiply
   311,733.50x = 670,087 × 670,087
4. Step 4: Simplify right side
   311,733.50x = 449,016,587,569
5. Step 5: Solve for x
   x = 449,016,587,569/311,733.50
6. Step 6: Final answer
   x = 1,440,386.06