Finding the Fourth Proportional to 5,479.72, 7,561.55 and 3,090.28

Step by Step Solution

1. Step 1: Write the proportion equation
   5,479.72 : 7,561.55 = 3,090.28 : x
2. Step 2: Convert to fraction form
   5,479.72/7,561.55 = 3,090.28/x
3. Step 3: Cross multiply
   5,479.72x = 7,561.55 × 3,090.28
4. Step 4: Simplify right side
   5,479.72x = 23,367,288.47
5. Step 5: Solve for x
   x = 23,367,288.47/5,479.72
6. Step 6: Final answer
   x = 4,264.32