Finding the Fourth Proportional to 2,105,447.72, 3,157,842.14 and 685,494.23

Step by Step Solution

1. Step 1: Write the proportion equation
   2,105,447.72 : 3,157,842.14 = 685,494.23 : x
2. Step 2: Convert to fraction form
   2,105,447.72/3,157,842.14 = 685,494.23/x
3. Step 3: Cross multiply
   2,105,447.72x = 3,157,842.14 × 685,494.23
4. Step 4: Simplify right side
   2,105,447.72x = 2,164,682,549,574.77
5. Step 5: Solve for x
   x = 2,164,682,549,574.77/2,105,447.72
6. Step 6: Final answer
   x = 1,028,134.08