Finding the Fourth Proportional to 5,385.56, 8,078.38 and 1,490.27

Step by Step Solution

1. Step 1: Write the proportion equation
   5,385.56 : 8,078.38 = 1,490.27 : x
2. Step 2: Convert to fraction form
   5,385.56/8,078.38 = 1,490.27/x
3. Step 3: Cross multiply
   5,385.56x = 8,078.38 × 1,490.27
4. Step 4: Simplify right side
   5,385.56x = 12,038,923.25
5. Step 5: Solve for x
   x = 12,038,923.25/5,385.56
6. Step 6: Final answer
   x = 2,235.41