Finding the Fourth Proportional to 2,105,448.72, 3,157,843.64 and 685,495.23

Step by Step Solution

1. Step 1: Write the proportion equation
   2,105,448.72 : 3,157,843.64 = 685,495.23 : x
2. Step 2: Convert to fraction form
   2,105,448.72/3,157,843.64 = 685,495.23/x
3. Step 3: Cross multiply
   2,105,448.72x = 3,157,843.64 × 685,495.23
4. Step 4: Simplify right side
   2,105,448.72x = 2,164,686,752,305.84
5. Step 5: Solve for x
   x = 2,164,686,752,305.84/2,105,448.72
6. Step 6: Final answer
   x = 1,028,135.59