Finding the Fourth Proportional to 9,863.60, 13,611.37 and 5,556.59

Step by Step Solution

1. Step 1: Write the proportion equation
   9,863.60 : 13,611.37 = 5,556.59 : x
2. Step 2: Convert to fraction form
   9,863.60/13,611.37 = 5,556.59/x
3. Step 3: Cross multiply
   9,863.60x = 13,611.37 × 5,556.59
4. Step 4: Simplify right side
   9,863.60x = 75,632,720.48
5. Step 5: Solve for x
   x = 75,632,720.48/9,863.60
6. Step 6: Final answer
   x = 7,667.87