Finding the Fourth Proportional to 4,142.31, 5,709.91 and 2,813.69

Step by Step Solution

1. Step 1: Write the proportion equation
   4,142.31 : 5,709.91 = 2,813.69 : x
2. Step 2: Convert to fraction form
   4,142.31/5,709.91 = 2,813.69/x
3. Step 3: Cross multiply
   4,142.31x = 5,709.91 × 2,813.69
4. Step 4: Simplify right side
   4,142.31x = 16,065,916.67
5. Step 5: Solve for x
   x = 16,065,916.67/4,142.31
6. Step 6: Final answer
   x = 3,878.49