Finding the Fourth Proportional to 3,243.69, 4,471.34 and 3,112.47

Step by Step Solution

1. Step 1: Write the proportion equation
   3,243.69 : 4,471.34 = 3,112.47 : x
2. Step 2: Convert to fraction form
   3,243.69/4,471.34 = 3,112.47/x
3. Step 3: Cross multiply
   3,243.69x = 4,471.34 × 3,112.47
4. Step 4: Simplify right side
   3,243.69x = 13,916,896.05
5. Step 5: Solve for x
   x = 13,916,896.05/3,243.69
6. Step 6: Final answer
   x = 4,290.45