Finding the Fourth Proportional to 9,321.57, 12,860.28 and 5,544.87

Step by Step Solution

1. Step 1: Write the proportion equation
   9,321.57 : 12,860.28 = 5,544.87 : x
2. Step 2: Convert to fraction form
   9,321.57/12,860.28 = 5,544.87/x
3. Step 3: Cross multiply
   9,321.57x = 12,860.28 × 5,544.87
4. Step 4: Simplify right side
   9,321.57x = 71,308,580.76
5. Step 5: Solve for x
   x = 71,308,580.76/9,321.57
6. Step 6: Final answer
   x = 7,649.85