Finding the Fourth Proportional to 16,819.31, 25,216.31 and 10,158.08

Step by Step Solution

1. Step 1: Write the proportion equation
   16,819.31 : 25,216.31 = 10,158.08 : x
2. Step 2: Convert to fraction form
   16,819.31/25,216.31 = 10,158.08/x
3. Step 3: Cross multiply
   16,819.31x = 25,216.31 × 10,158.08
4. Step 4: Simplify right side
   16,819.31x = 256,149,193.60
5. Step 5: Solve for x
   x = 256,149,193.60/16,819.31
6. Step 6: Final answer
   x = 15,229.47