Finding the Fourth Proportional to 9,519.14, 13,137.17 and 5,487.21

Step by Step Solution

1. Step 1: Write the proportion equation
   9,519.14 : 13,137.17 = 5,487.21 : x
2. Step 2: Convert to fraction form
   9,519.14/13,137.17 = 5,487.21/x
3. Step 3: Cross multiply
   9,519.14x = 13,137.17 × 5,487.21
4. Step 4: Simplify right side
   9,519.14x = 72,086,383.16
5. Step 5: Solve for x
   x = 72,086,383.16/9,519.14
6. Step 6: Final answer
   x = 7,572.78