Finding the Fourth Proportional to 3,141.69, 4,335.20 and 1,815.82

Step by Step Solution

1. Step 1: Write the proportion equation
   3,141.69 : 4,335.20 = 1,815.82 : x
2. Step 2: Convert to fraction form
   3,141.69/4,335.20 = 1,815.82/x
3. Step 3: Cross multiply
   3,141.69x = 4,335.20 × 1,815.82
4. Step 4: Simplify right side
   3,141.69x = 7,871,921.19
5. Step 5: Solve for x
   x = 7,871,921.19/3,141.69
6. Step 6: Final answer
   x = 2,505.64