Finding the Fourth Proportional to 2,853.61, 3,935.51 and 1,858.53

Step by Step Solution

1. Step 1: Write the proportion equation
   2,853.61 : 3,935.51 = 1,858.53 : x
2. Step 2: Convert to fraction form
   2,853.61/3,935.51 = 1,858.53/x
3. Step 3: Cross multiply
   2,853.61x = 3,935.51 × 1,858.53
4. Step 4: Simplify right side
   2,853.61x = 7,314,234.43
5. Step 5: Solve for x
   x = 7,314,234.43/2,853.61
6. Step 6: Final answer
   x = 2,563.15