Finding the Fourth Proportional to 9,580.57, 13,221.05 and 5,388.82

Step by Step Solution

1. Step 1: Write the proportion equation
   9,580.57 : 13,221.05 = 5,388.82 : x
2. Step 2: Convert to fraction form
   9,580.57/13,221.05 = 5,388.82/x
3. Step 3: Cross multiply
   9,580.57x = 13,221.05 × 5,388.82
4. Step 4: Simplify right side
   9,580.57x = 71,245,798.66
5. Step 5: Solve for x
   x = 71,245,798.66/9,580.57
6. Step 6: Final answer
   x = 7,436.49