Finding the Fourth Proportional to 5,665.50, 8,490.42 and 3,168

Step by Step Solution

1. Step 1: Write the proportion equation
   5,665.50 : 8,490.42 = 3,168 : x
2. Step 2: Convert to fraction form
   5,665.50/8,490.42 = 3,168/x
3. Step 3: Cross multiply
   5,665.50x = 8,490.42 × 3,168
4. Step 4: Simplify right side
   5,665.50x = 26,897,650.56
5. Step 5: Solve for x
   x = 26,897,650.56/5,665.50
6. Step 6: Final answer
   x = 4,747.62