Finding the Fourth Proportional to 2,786.59, 4,177.45 and 1,054.09

Step by Step Solution

1. Step 1: Write the proportion equation
   2,786.59 : 4,177.45 = 1,054.09 : x
2. Step 2: Convert to fraction form
   2,786.59/4,177.45 = 1,054.09/x
3. Step 3: Cross multiply
   2,786.59x = 4,177.45 × 1,054.09
4. Step 4: Simplify right side
   2,786.59x = 4,403,408.27
5. Step 5: Solve for x
   x = 4,403,408.27/2,786.59
6. Step 6: Final answer
   x = 1,580.21