Finding the Fourth Proportional to 3,131.68, 4,321.83 and 2,137.42

Step by Step Solution

1. Step 1: Write the proportion equation
   3,131.68 : 4,321.83 = 2,137.42 : x
2. Step 2: Convert to fraction form
   3,131.68/4,321.83 = 2,137.42/x
3. Step 3: Cross multiply
   3,131.68x = 4,321.83 × 2,137.42
4. Step 4: Simplify right side
   3,131.68x = 9,237,565.88
5. Step 5: Solve for x
   x = 9,237,565.88/3,131.68
6. Step 6: Final answer
   x = 2,949.72