Finding the Fourth Proportional to 4,288.76, 5,909.59 and 4,009.31

Step by Step Solution

1. Step 1: Write the proportion equation
   4,288.76 : 5,909.59 = 4,009.31 : x
2. Step 2: Convert to fraction form
   4,288.76/5,909.59 = 4,009.31/x
3. Step 3: Cross multiply
   4,288.76x = 5,909.59 × 4,009.31
4. Step 4: Simplify right side
   4,288.76x = 23,693,375.91
5. Step 5: Solve for x
   x = 23,693,375.91/4,288.76
6. Step 6: Final answer
   x = 5,524.53