Finding the Fourth Proportional to 9,288.57, 12,818.06 and 5,255.34

Step by Step Solution

1. Step 1: Write the proportion equation
   9,288.57 : 12,818.06 = 5,255.34 : x
2. Step 2: Convert to fraction form
   9,288.57/12,818.06 = 5,255.34/x
3. Step 3: Cross multiply
   9,288.57x = 12,818.06 × 5,255.34
4. Step 4: Simplify right side
   9,288.57x = 67,363,237.16
5. Step 5: Solve for x
   x = 67,363,237.16/9,288.57
6. Step 6: Final answer
   x = 7,252.27