Finding the Fourth Proportional to 9,288.48, 12,818.64 and 5,513.88

Step by Step Solution

1. Step 1: Write the proportion equation
   9,288.48 : 12,818.64 = 5,513.88 : x
2. Step 2: Convert to fraction form
   9,288.48/12,818.64 = 5,513.88/x
3. Step 3: Cross multiply
   9,288.48x = 12,818.64 × 5,513.88
4. Step 4: Simplify right side
   9,288.48x = 70,680,442.72
5. Step 5: Solve for x
   x = 70,680,442.72/9,288.48
6. Step 6: Final answer
   x = 7,609.47