Finding the Fourth Proportional to 4,272.80, 6,366.72 and 3,807

Step by Step Solution

1. Step 1: Write the proportion equation
   4,272.80 : 6,366.72 = 3,807 : x
2. Step 2: Convert to fraction form
   4,272.80/6,366.72 = 3,807/x
3. Step 3: Cross multiply
   4,272.80x = 6,366.72 × 3,807
4. Step 4: Simplify right side
   4,272.80x = 24,238,103.04
5. Step 5: Solve for x
   x = 24,238,103.04/4,272.80
6. Step 6: Final answer
   x = 5,672.65