Finding the Fourth Proportional to 9,805.45, 13,529.34 and 5,556.15

Step by Step Solution

1. Step 1: Write the proportion equation
   9,805.45 : 13,529.34 = 5,556.15 : x
2. Step 2: Convert to fraction form
   9,805.45/13,529.34 = 5,556.15/x
3. Step 3: Cross multiply
   9,805.45x = 13,529.34 × 5,556.15
4. Step 4: Simplify right side
   9,805.45x = 75,171,042.44
5. Step 5: Solve for x
   x = 75,171,042.44/9,805.45
6. Step 6: Final answer
   x = 7,666.25