Finding the Fourth Proportional to 9,979.83, 13,772.78 and 5,503.56

Step by Step Solution

1. Step 1: Write the proportion equation
   9,979.83 : 13,772.78 = 5,503.56 : x
2. Step 2: Convert to fraction form
   9,979.83/13,772.78 = 5,503.56/x
3. Step 3: Cross multiply
   9,979.83x = 13,772.78 × 5,503.56
4. Step 4: Simplify right side
   9,979.83x = 75,799,293.58
5. Step 5: Solve for x
   x = 75,799,293.58/9,979.83
6. Step 6: Final answer
   x = 7,595.25