Finding the Fourth Proportional to 8,146.47, 12,216.52 and 3,928.91

Step by Step Solution

1. Step 1: Write the proportion equation
   8,146.47 : 12,216.52 = 3,928.91 : x
2. Step 2: Convert to fraction form
   8,146.47/12,216.52 = 3,928.91/x
3. Step 3: Cross multiply
   8,146.47x = 12,216.52 × 3,928.91
4. Step 4: Simplify right side
   8,146.47x = 47,997,551.42
5. Step 5: Solve for x
   x = 47,997,551.42/8,146.47
6. Step 6: Final answer
   x = 5,891.82