Finding the Fourth Proportional to 9,805.69, 13,531.74 and 5,556.43

Step by Step Solution

1. Step 1: Write the proportion equation
   9,805.69 : 13,531.74 = 5,556.43 : x
2. Step 2: Convert to fraction form
   9,805.69/13,531.74 = 5,556.43/x
3. Step 3: Cross multiply
   9,805.69x = 13,531.74 × 5,556.43
4. Step 4: Simplify right side
   9,805.69x = 75,188,166.09
5. Step 5: Solve for x
   x = 75,188,166.09/9,805.69
6. Step 6: Final answer
   x = 7,667.81