Finding the Fourth Proportional to 9,979.78, 13,771.54 and 5,503.52

Step by Step Solution

1. Step 1: Write the proportion equation
   9,979.78 : 13,771.54 = 5,503.52 : x
2. Step 2: Convert to fraction form
   9,979.78/13,771.54 = 5,503.52/x
3. Step 3: Cross multiply
   9,979.78x = 13,771.54 × 5,503.52
4. Step 4: Simplify right side
   9,979.78x = 75,791,945.82
5. Step 5: Solve for x
   x = 75,791,945.82/9,979.78
6. Step 6: Final answer
   x = 7,594.55