Finding the Fourth Proportional to 3,815.82, 5,737.59 and 3,511.31

Step by Step Solution

1. Step 1: Write the proportion equation
   3,815.82 : 5,737.59 = 3,511.31 : x
2. Step 2: Convert to fraction form
   3,815.82/5,737.59 = 3,511.31/x
3. Step 3: Cross multiply
   3,815.82x = 5,737.59 × 3,511.31
4. Step 4: Simplify right side
   3,815.82x = 20,146,428.45
5. Step 5: Solve for x
   x = 20,146,428.45/3,815.82
6. Step 6: Final answer
   x = 5,279.71