Finding the Fourth Proportional to 6,017.12, 8,304.72 and 3,921.20

Step by Step Solution

1. Step 1: Write the proportion equation
   6,017.12 : 8,304.72 = 3,921.20 : x
2. Step 2: Convert to fraction form
   6,017.12/8,304.72 = 3,921.20/x
3. Step 3: Cross multiply
   6,017.12x = 8,304.72 × 3,921.20
4. Step 4: Simplify right side
   6,017.12x = 32,564,468.06
5. Step 5: Solve for x
   x = 32,564,468.06/6,017.12
6. Step 6: Final answer
   x = 5,411.97