Finding the Fourth Proportional to 9,979.67, 13,771.71 and 5,503.29

Step by Step Solution

1. Step 1: Write the proportion equation
   9,979.67 : 13,771.71 = 5,503.29 : x
2. Step 2: Convert to fraction form
   9,979.67/13,771.71 = 5,503.29/x
3. Step 3: Cross multiply
   9,979.67x = 13,771.71 × 5,503.29
4. Step 4: Simplify right side
   9,979.67x = 75,789,713.93
5. Step 5: Solve for x
   x = 75,789,713.93/9,979.67
6. Step 6: Final answer
   x = 7,594.41