Finding the Fourth Proportional to 3,131.67, 4,321.77 and 1,715.42

Step by Step Solution

1. Step 1: Write the proportion equation
   3,131.67 : 4,321.77 = 1,715.42 : x
2. Step 2: Convert to fraction form
   3,131.67/4,321.77 = 1,715.42/x
3. Step 3: Cross multiply
   3,131.67x = 4,321.77 × 1,715.42
4. Step 4: Simplify right side
   3,131.67x = 7,413,659.83
5. Step 5: Solve for x
   x = 7,413,659.83/3,131.67
6. Step 6: Final answer
   x = 2,367.32