Finding the Fourth Proportional to 3,810.59, 5,257.72 and 2,318.42

Step by Step Solution

1. Step 1: Write the proportion equation
   3,810.59 : 5,257.72 = 2,318.42 : x
2. Step 2: Convert to fraction form
   3,810.59/5,257.72 = 2,318.42/x
3. Step 3: Cross multiply
   3,810.59x = 5,257.72 × 2,318.42
4. Step 4: Simplify right side
   3,810.59x = 12,189,622.51
5. Step 5: Solve for x
   x = 12,189,622.51/3,810.59
6. Step 6: Final answer
   x = 3,198.88