Finding the Fourth Proportional to 11,621.32, 17,431.83 and 2,856.31

Step by Step Solution

1. Step 1: Write the proportion equation
   11,621.32 : 17,431.83 = 2,856.31 : x
2. Step 2: Convert to fraction form
   11,621.32/17,431.83 = 2,856.31/x
3. Step 3: Cross multiply
   11,621.32x = 17,431.83 × 2,856.31
4. Step 4: Simplify right side
   11,621.32x = 49,790,772.86
5. Step 5: Solve for x
   x = 49,790,772.86/11,621.32
6. Step 6: Final answer
   x = 4,284.43