Finding the Fourth Proportional to 9,559.06, 13,191.59 and 5,579.40

Step by Step Solution

1. Step 1: Write the proportion equation
   9,559.06 : 13,191.59 = 5,579.40 : x
2. Step 2: Convert to fraction form
   9,559.06/13,191.59 = 5,579.40/x
3. Step 3: Cross multiply
   9,559.06x = 13,191.59 × 5,579.40
4. Step 4: Simplify right side
   9,559.06x = 73,601,129.35
5. Step 5: Solve for x
   x = 73,601,129.35/9,559.06
6. Step 6: Final answer
   x = 7,699.62