Finding the Fourth Proportional to 9,979.72, 13,772.04 and 5,503.36

Step by Step Solution

1. Step 1: Write the proportion equation
   9,979.72 : 13,772.04 = 5,503.36 : x
2. Step 2: Convert to fraction form
   9,979.72/13,772.04 = 5,503.36/x
3. Step 3: Cross multiply
   9,979.72x = 13,772.04 × 5,503.36
4. Step 4: Simplify right side
   9,979.72x = 75,792,494.05
5. Step 5: Solve for x
   x = 75,792,494.05/9,979.72
6. Step 6: Final answer
   x = 7,594.65