Finding the Fourth Proportional to 25,745.31, 38,619.72 and 8,216.46

Step by Step Solution

1. Step 1: Write the proportion equation
   25,745.31 : 38,619.72 = 8,216.46 : x
2. Step 2: Convert to fraction form
   25,745.31/38,619.72 = 8,216.46/x
3. Step 3: Cross multiply
   25,745.31x = 38,619.72 × 8,216.46
4. Step 4: Simplify right side
   25,745.31x = 317,317,384.59
5. Step 5: Solve for x
   x = 317,317,384.59/25,745.31
6. Step 6: Final answer
   x = 12,325.25