Finding the Fourth Proportional to 9,356.04, 12,909.24 and 5,580.54

Step by Step Solution

1. Step 1: Write the proportion equation
   9,356.04 : 12,909.24 = 5,580.54 : x
2. Step 2: Convert to fraction form
   9,356.04/12,909.24 = 5,580.54/x
3. Step 3: Cross multiply
   9,356.04x = 12,909.24 × 5,580.54
4. Step 4: Simplify right side
   9,356.04x = 72,040,530.19
5. Step 5: Solve for x
   x = 72,040,530.19/9,356.04
6. Step 6: Final answer
   x = 7,699.90