Finding the Fourth Proportional to 5,498.56, 8,259.20 and 3,420.96

Step by Step Solution

1. Step 1: Write the proportion equation
   5,498.56 : 8,259.20 = 3,420.96 : x
2. Step 2: Convert to fraction form
   5,498.56/8,259.20 = 3,420.96/x
3. Step 3: Cross multiply
   5,498.56x = 8,259.20 × 3,420.96
4. Step 4: Simplify right side
   5,498.56x = 28,254,392.83
5. Step 5: Solve for x
   x = 28,254,392.83/5,498.56
6. Step 6: Final answer
   x = 5,138.51