Finding the Fourth Proportional to 2,854.02, 3,936.15 and 1,858.53

Step by Step Solution

1. Step 1: Write the proportion equation
   2,854.02 : 3,936.15 = 1,858.53 : x
2. Step 2: Convert to fraction form
   2,854.02/3,936.15 = 1,858.53/x
3. Step 3: Cross multiply
   2,854.02x = 3,936.15 × 1,858.53
4. Step 4: Simplify right side
   2,854.02x = 7,315,452.86
5. Step 5: Solve for x
   x = 7,315,452.86/2,854.02
6. Step 6: Final answer
   x = 2,563.21