Finding the Fourth Proportional to 9,867.06, 13,616.46 and 5,390.82

Step by Step Solution

1. Step 1: Write the proportion equation
   9,867.06 : 13,616.46 = 5,390.82 : x
2. Step 2: Convert to fraction form
   9,867.06/13,616.46 = 5,390.82/x
3. Step 3: Cross multiply
   9,867.06x = 13,616.46 × 5,390.82
4. Step 4: Simplify right side
   9,867.06x = 73,403,884.90
5. Step 5: Solve for x
   x = 73,403,884.90/9,867.06
6. Step 6: Final answer
   x = 7,439.29