Finding the Fourth Proportional to 16,815.78, 25,216.36 and 5,719.50

Step by Step Solution

1. Step 1: Write the proportion equation
   16,815.78 : 25,216.36 = 5,719.50 : x
2. Step 2: Convert to fraction form
   16,815.78/25,216.36 = 5,719.50/x
3. Step 3: Cross multiply
   16,815.78x = 25,216.36 × 5,719.50
4. Step 4: Simplify right side
   16,815.78x = 144,224,971.02
5. Step 5: Solve for x
   x = 144,224,971.02/16,815.78
6. Step 6: Final answer
   x = 8,576.76