Finding the Fourth Proportional to 9,046.39, 12,486.50 and 5,509.57

Step by Step Solution

1. Step 1: Write the proportion equation
   9,046.39 : 12,486.50 = 5,509.57 : x
2. Step 2: Convert to fraction form
   9,046.39/12,486.50 = 5,509.57/x
3. Step 3: Cross multiply
   9,046.39x = 12,486.50 × 5,509.57
4. Step 4: Simplify right side
   9,046.39x = 68,795,218.26
5. Step 5: Solve for x
   x = 68,795,218.26/9,046.39
6. Step 6: Final answer
   x = 7,604.72