Finding the Third Proportional to 393,012 and 842,046.50

Step by Step Solution

1. Step 1: Write the proportion equation
   393,012 : 842,046.50 = 842,046.50 : x
2. Step 2: Convert to fraction form
   393,012/842,046.50 = 842,046.50/x
3. Step 3: Cross multiply
   393,012x = 842,046.50 × 842,046.50
4. Step 4: Simplify right side
   393,012x = 709,042,308,162.25
5. Step 5: Solve for x
   x = 709,042,308,162.25/393,012
6. Step 6: Final answer
   x = 1,804,123.81