Finding the Fourth Proportional to 9,979.49, 13,771.61 and 5,503.43

Step by Step Solution

1. Step 1: Write the proportion equation
   9,979.49 : 13,771.61 = 5,503.43 : x
2. Step 2: Convert to fraction form
   9,979.49/13,771.61 = 5,503.43/x
3. Step 3: Cross multiply
   9,979.49x = 13,771.61 × 5,503.43
4. Step 4: Simplify right side
   9,979.49x = 75,791,091.62
5. Step 5: Solve for x
   x = 75,791,091.62/9,979.49
6. Step 6: Final answer
   x = 7,594.69