Finding the Fourth Proportional to 8,422.72, 12,628.02 and 3,977.92

Step by Step Solution

1. Step 1: Write the proportion equation
   8,422.72 : 12,628.02 = 3,977.92 : x
2. Step 2: Convert to fraction form
   8,422.72/12,628.02 = 3,977.92/x
3. Step 3: Cross multiply
   8,422.72x = 12,628.02 × 3,977.92
4. Step 4: Simplify right side
   8,422.72x = 50,233,253.32
5. Step 5: Solve for x
   x = 50,233,253.32/8,422.72
6. Step 6: Final answer
   x = 5,964.02