Finding the Fourth Proportional to 2,857,128.10, 4,282,668.15 and 1,058,856.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,857,128.10 : 4,282,668.15 = 1,058,856.10 : x
2. Step 2: Convert to fraction form
   2,857,128.10/4,282,668.15 = 1,058,856.10/x
3. Step 3: Cross multiply
   2,857,128.10x = 4,282,668.15 × 1,058,856.10
4. Step 4: Simplify right side
   2,857,128.10x = 4,534,729,294,903.22
5. Step 5: Solve for x
   x = 4,534,729,294,903.22/2,857,128.10
6. Step 6: Final answer
   x = 1,587,163.45