Finding the Fourth Proportional to 12,866.16, 19,301.64 and 4,103.28

Step by Step Solution

1. Step 1: Write the proportion equation
   12,866.16 : 19,301.64 = 4,103.28 : x
2. Step 2: Convert to fraction form
   12,866.16/19,301.64 = 4,103.28/x
3. Step 3: Cross multiply
   12,866.16x = 19,301.64 × 4,103.28
4. Step 4: Simplify right side
   12,866.16x = 79,200,033.38
5. Step 5: Solve for x
   x = 79,200,033.38/12,866.16
6. Step 6: Final answer
   x = 6,155.69