Finding the Fourth Proportional to 3,131.81, 4,321.90 and 1,734.56

Step by Step Solution

1. Step 1: Write the proportion equation
   3,131.81 : 4,321.90 = 1,734.56 : x
2. Step 2: Convert to fraction form
   3,131.81/4,321.90 = 1,734.56/x
3. Step 3: Cross multiply
   3,131.81x = 4,321.90 × 1,734.56
4. Step 4: Simplify right side
   3,131.81x = 7,496,594.86
5. Step 5: Solve for x
   x = 7,496,594.86/3,131.81
6. Step 6: Final answer
   x = 2,393.69