Finding the Fourth Proportional to 16,836.72, 25,257.96 and 5,147.28

Step by Step Solution

1. Step 1: Write the proportion equation
   16,836.72 : 25,257.96 = 5,147.28 : x
2. Step 2: Convert to fraction form
   16,836.72/25,257.96 = 5,147.28/x
3. Step 3: Cross multiply
   16,836.72x = 25,257.96 × 5,147.28
4. Step 4: Simplify right side
   16,836.72x = 130,009,792.35
5. Step 5: Solve for x
   x = 130,009,792.35/16,836.72
6. Step 6: Final answer
   x = 7,721.80