Finding the Fourth Proportional to 9,289.86, 12,818.10 and 5,511.37

Step by Step Solution

1. Step 1: Write the proportion equation
   9,289.86 : 12,818.10 = 5,511.37 : x
2. Step 2: Convert to fraction form
   9,289.86/12,818.10 = 5,511.37/x
3. Step 3: Cross multiply
   9,289.86x = 12,818.10 × 5,511.37
4. Step 4: Simplify right side
   9,289.86x = 70,645,291.80
5. Step 5: Solve for x
   x = 70,645,291.80/9,289.86
6. Step 6: Final answer
   x = 7,604.56