Finding the Fourth Proportional to 9,979.98, 13,772.46 and 5,503.89

Step by Step Solution

1. Step 1: Write the proportion equation
   9,979.98 : 13,772.46 = 5,503.89 : x
2. Step 2: Convert to fraction form
   9,979.98/13,772.46 = 5,503.89/x
3. Step 3: Cross multiply
   9,979.98x = 13,772.46 × 5,503.89
4. Step 4: Simplify right side
   9,979.98x = 75,802,104.87
5. Step 5: Solve for x
   x = 75,802,104.87/9,979.98
6. Step 6: Final answer
   x = 7,595.42