Finding the Third Proportional to 393,012 and 842,055.75

Step by Step Solution

1. Step 1: Write the proportion equation
   393,012 : 842,055.75 = 842,055.75 : x
2. Step 2: Convert to fraction form
   393,012/842,055.75 = 842,055.75/x
3. Step 3: Cross multiply
   393,012x = 842,055.75 × 842,055.75
4. Step 4: Simplify right side
   393,012x = 709,057,886,108.06
5. Step 5: Solve for x
   x = 709,057,886,108.06/393,012
6. Step 6: Final answer
   x = 1,804,163.45