Finding the Fourth Proportional to 9,288.56, 12,818.05 and 5,255.35

Step by Step Solution

1. Step 1: Write the proportion equation
   9,288.56 : 12,818.05 = 5,255.35 : x
2. Step 2: Convert to fraction form
   9,288.56/12,818.05 = 5,255.35/x
3. Step 3: Cross multiply
   9,288.56x = 12,818.05 × 5,255.35
4. Step 4: Simplify right side
   9,288.56x = 67,363,293.88
5. Step 5: Solve for x
   x = 67,363,293.88/9,288.56
6. Step 6: Final answer
   x = 7,252.28