Finding the Fourth Proportional to 15,595.37, 21,521.61 and 8,425.28

Step by Step Solution

1. Step 1: Write the proportion equation
   15,595.37 : 21,521.61 = 8,425.28 : x
2. Step 2: Convert to fraction form
   15,595.37/21,521.61 = 8,425.28/x
3. Step 3: Cross multiply
   15,595.37x = 21,521.61 × 8,425.28
4. Step 4: Simplify right side
   15,595.37x = 181,325,644.10
5. Step 5: Solve for x
   x = 181,325,644.10/15,595.37
6. Step 6: Final answer
   x = 11,626.89