Finding the Fourth Proportional to 3,838.60, 5,753.91 and 1,861.31

Step by Step Solution

1. Step 1: Write the proportion equation
   3,838.60 : 5,753.91 = 1,861.31 : x
2. Step 2: Convert to fraction form
   3,838.60/5,753.91 = 1,861.31/x
3. Step 3: Cross multiply
   3,838.60x = 5,753.91 × 1,861.31
4. Step 4: Simplify right side
   3,838.60x = 10,709,826.35
5. Step 5: Solve for x
   x = 10,709,826.35/3,838.60
6. Step 6: Final answer
   x = 2,790.04