Finding the Fourth Proportional to 5,288.58, 7,289.82 and 4,167.72

Step by Step Solution

1. Step 1: Write the proportion equation
   5,288.58 : 7,289.82 = 4,167.72 : x
2. Step 2: Convert to fraction form
   5,288.58/7,289.82 = 4,167.72/x
3. Step 3: Cross multiply
   5,288.58x = 7,289.82 × 4,167.72
4. Step 4: Simplify right side
   5,288.58x = 30,381,928.61
5. Step 5: Solve for x
   x = 30,381,928.61/5,288.58
6. Step 6: Final answer
   x = 5,744.82