Finding the Fourth Proportional to 9,979.39, 13,771.67 and 5,503.31

Step by Step Solution

1. Step 1: Write the proportion equation
   9,979.39 : 13,771.67 = 5,503.31 : x
2. Step 2: Convert to fraction form
   9,979.39/13,771.67 = 5,503.31/x
3. Step 3: Cross multiply
   9,979.39x = 13,771.67 × 5,503.31
4. Step 4: Simplify right side
   9,979.39x = 75,789,769.23
5. Step 5: Solve for x
   x = 75,789,769.23/9,979.39
6. Step 6: Final answer
   x = 7,594.63