Finding the Fourth Proportional to 9,630.75, 13,290.53 and 5,439.09

Step by Step Solution

1. Step 1: Write the proportion equation
   9,630.75 : 13,290.53 = 5,439.09 : x
2. Step 2: Convert to fraction form
   9,630.75/13,290.53 = 5,439.09/x
3. Step 3: Cross multiply
   9,630.75x = 13,290.53 × 5,439.09
4. Step 4: Simplify right side
   9,630.75x = 72,288,361.62
5. Step 5: Solve for x
   x = 72,288,361.62/9,630.75
6. Step 6: Final answer
   x = 7,506.00