Finding the Fourth Proportional to 9,868.15, 13,617.46 and 5,391.01

Step by Step Solution

1. Step 1: Write the proportion equation
   9,868.15 : 13,617.46 = 5,391.01 : x
2. Step 2: Convert to fraction form
   9,868.15/13,617.46 = 5,391.01/x
3. Step 3: Cross multiply
   9,868.15x = 13,617.46 × 5,391.01
4. Step 4: Simplify right side
   9,868.15x = 73,411,863.03
5. Step 5: Solve for x
   x = 73,411,863.03/9,868.15
6. Step 6: Final answer
   x = 7,439.27