Finding the Third Proportional to 311,850 and 670,285.50

Step by Step Solution

1. Step 1: Write the proportion equation
   311,850 : 670,285.50 = 670,285.50 : x
2. Step 2: Convert to fraction form
   311,850/670,285.50 = 670,285.50/x
3. Step 3: Cross multiply
   311,850x = 670,285.50 × 670,285.50
4. Step 4: Simplify right side
   311,850x = 449,282,651,510.25
5. Step 5: Solve for x
   x = 449,282,651,510.25/311,850
6. Step 6: Final answer
   x = 1,440,701.14