Finding the Fourth Proportional to 5,458.30, 8,188.83 and 2,171.38

Step by Step Solution

1. Step 1: Write the proportion equation
   5,458.30 : 8,188.83 = 2,171.38 : x
2. Step 2: Convert to fraction form
   5,458.30/8,188.83 = 2,171.38/x
3. Step 3: Cross multiply
   5,458.30x = 8,188.83 × 2,171.38
4. Step 4: Simplify right side
   5,458.30x = 17,781,061.69
5. Step 5: Solve for x
   x = 17,781,061.69/5,458.30
6. Step 6: Final answer
   x = 3,257.62