Finding the Fourth Proportional to 8,598.72, 12,905.28 and 3,408.16

Step by Step Solution

1. Step 1: Write the proportion equation
   8,598.72 : 12,905.28 = 3,408.16 : x
2. Step 2: Convert to fraction form
   8,598.72/12,905.28 = 3,408.16/x
3. Step 3: Cross multiply
   8,598.72x = 12,905.28 × 3,408.16
4. Step 4: Simplify right side
   8,598.72x = 43,983,259.08
5. Step 5: Solve for x
   x = 43,983,259.08/8,598.72
6. Step 6: Final answer
   x = 5,115.09