Finding the Fourth Proportional to 9,868.41, 13,619.29 and 5,618.54

Step by Step Solution

1. Step 1: Write the proportion equation
   9,868.41 : 13,619.29 = 5,618.54 : x
2. Step 2: Convert to fraction form
   9,868.41/13,619.29 = 5,618.54/x
3. Step 3: Cross multiply
   9,868.41x = 13,619.29 × 5,618.54
4. Step 4: Simplify right side
   9,868.41x = 76,520,500.09
5. Step 5: Solve for x
   x = 76,520,500.09/9,868.41
6. Step 6: Final answer
   x = 7,754.09