Finding the Fourth Proportional to 9,840.28, 13,579.50 and 5,648.56

Step by Step Solution

1. Step 1: Write the proportion equation
   9,840.28 : 13,579.50 = 5,648.56 : x
2. Step 2: Convert to fraction form
   9,840.28/13,579.50 = 5,648.56/x
3. Step 3: Cross multiply
   9,840.28x = 13,579.50 × 5,648.56
4. Step 4: Simplify right side
   9,840.28x = 76,704,620.52
5. Step 5: Solve for x
   x = 76,704,620.52/9,840.28
6. Step 6: Final answer
   x = 7,794.96