Finding the Fourth Proportional to 4,131.74, 5,697.50 and 3,187.68

Step by Step Solution

1. Step 1: Write the proportion equation
   4,131.74 : 5,697.50 = 3,187.68 : x
2. Step 2: Convert to fraction form
   4,131.74/5,697.50 = 3,187.68/x
3. Step 3: Cross multiply
   4,131.74x = 5,697.50 × 3,187.68
4. Step 4: Simplify right side
   4,131.74x = 18,161,790.86
5. Step 5: Solve for x
   x = 18,161,790.86/4,131.74
6. Step 6: Final answer
   x = 4,395.68