Finding the Fourth Proportional to 9,687.66, 13,369.59 and 5,439.03

Step by Step Solution

1. Step 1: Write the proportion equation
   9,687.66 : 13,369.59 = 5,439.03 : x
2. Step 2: Convert to fraction form
   9,687.66/13,369.59 = 5,439.03/x
3. Step 3: Cross multiply
   9,687.66x = 13,369.59 × 5,439.03
4. Step 4: Simplify right side
   9,687.66x = 72,717,601.10
5. Step 5: Solve for x
   x = 72,717,601.10/9,687.66
6. Step 6: Final answer
   x = 7,506.21