Finding the Fourth Proportional to 3,458.47, 4,771.15 and 2,131.69

Step by Step Solution

1. Step 1: Write the proportion equation
   3,458.47 : 4,771.15 = 2,131.69 : x
2. Step 2: Convert to fraction form
   3,458.47/4,771.15 = 2,131.69/x
3. Step 3: Cross multiply
   3,458.47x = 4,771.15 × 2,131.69
4. Step 4: Simplify right side
   3,458.47x = 10,170,602.09
5. Step 5: Solve for x
   x = 10,170,602.09/3,458.47
6. Step 6: Final answer
   x = 2,940.78