Finding the Third Proportional to 311,833.50 and 660,747

Step by Step Solution

1. Step 1: Write the proportion equation
   311,833.50 : 660,747 = 660,747 : x
2. Step 2: Convert to fraction form
   311,833.50/660,747 = 660,747/x
3. Step 3: Cross multiply
   311,833.50x = 660,747 × 660,747
4. Step 4: Simplify right side
   311,833.50x = 436,586,598,009
5. Step 5: Solve for x
   x = 436,586,598,009/311,833.50
6. Step 6: Final answer
   x = 1,400,063.17