Finding the Fourth Proportional to 5,441.31, 8,155.89 and 2,151.90

Step by Step Solution

1. Step 1: Write the proportion equation
   5,441.31 : 8,155.89 = 2,151.90 : x
2. Step 2: Convert to fraction form
   5,441.31/8,155.89 = 2,151.90/x
3. Step 3: Cross multiply
   5,441.31x = 8,155.89 × 2,151.90
4. Step 4: Simplify right side
   5,441.31x = 17,550,659.69
5. Step 5: Solve for x
   x = 17,550,659.69/5,441.31
6. Step 6: Final answer
   x = 3,225.45