Finding the Fourth Proportional to 9,048.10, 12,486.37 and 5,511.31

Step by Step Solution

1. Step 1: Write the proportion equation
   9,048.10 : 12,486.37 = 5,511.31 : x
2. Step 2: Convert to fraction form
   9,048.10/12,486.37 = 5,511.31/x
3. Step 3: Cross multiply
   9,048.10x = 12,486.37 × 5,511.31
4. Step 4: Simplify right side
   9,048.10x = 68,816,165.86
5. Step 5: Solve for x
   x = 68,816,165.86/9,048.10
6. Step 6: Final answer
   x = 7,605.60