Finding the Fourth Proportional to 12,728.16, 19,092.78 and 4,404.15

Step by Step Solution

1. Step 1: Write the proportion equation
   12,728.16 : 19,092.78 = 4,404.15 : x
2. Step 2: Convert to fraction form
   12,728.16/19,092.78 = 4,404.15/x
3. Step 3: Cross multiply
   12,728.16x = 19,092.78 × 4,404.15
4. Step 4: Simplify right side
   12,728.16x = 84,087,467.04
5. Step 5: Solve for x
   x = 84,087,467.04/12,728.16
6. Step 6: Final answer
   x = 6,606.41