Finding the Fourth Proportional to 5,559.20, 8,296.52 and 5,111.20

Step by Step Solution

1. Step 1: Write the proportion equation
   5,559.20 : 8,296.52 = 5,111.20 : x
2. Step 2: Convert to fraction form
   5,559.20/8,296.52 = 5,111.20/x
3. Step 3: Cross multiply
   5,559.20x = 8,296.52 × 5,111.20
4. Step 4: Simplify right side
   5,559.20x = 42,405,173.02
5. Step 5: Solve for x
   x = 42,405,173.02/5,559.20
6. Step 6: Final answer
   x = 7,627.93