Finding the Fourth Proportional to 6,147.12, 8,480.52 and 3,905.04

Step by Step Solution

1. Step 1: Write the proportion equation
   6,147.12 : 8,480.52 = 3,905.04 : x
2. Step 2: Convert to fraction form
   6,147.12/8,480.52 = 3,905.04/x
3. Step 3: Cross multiply
   6,147.12x = 8,480.52 × 3,905.04
4. Step 4: Simplify right side
   6,147.12x = 33,116,769.82
5. Step 5: Solve for x
   x = 33,116,769.82/6,147.12
6. Step 6: Final answer
   x = 5,387.36