Finding the Fourth Proportional to 5,479.02, 7,559.28 and 3,120.72

Step by Step Solution

1. Step 1: Write the proportion equation
   5,479.02 : 7,559.28 = 3,120.72 : x
2. Step 2: Convert to fraction form
   5,479.02/7,559.28 = 3,120.72/x
3. Step 3: Cross multiply
   5,479.02x = 7,559.28 × 3,120.72
4. Step 4: Simplify right side
   5,479.02x = 23,590,396.28
5. Step 5: Solve for x
   x = 23,590,396.28/5,479.02
6. Step 6: Final answer
   x = 4,305.59