Finding the Fourth Proportional to 3,131.50, 4,321.50 and 1,734.28

Step by Step Solution

1. Step 1: Write the proportion equation
   3,131.50 : 4,321.50 = 1,734.28 : x
2. Step 2: Convert to fraction form
   3,131.50/4,321.50 = 1,734.28/x
3. Step 3: Cross multiply
   3,131.50x = 4,321.50 × 1,734.28
4. Step 4: Simplify right side
   3,131.50x = 7,494,691.02
5. Step 5: Solve for x
   x = 7,494,691.02/3,131.50
6. Step 6: Final answer
   x = 2,393.32