Finding the Fourth Proportional to 15,876.72, 21,906.72 and 9,589.44

Step by Step Solution

1. Step 1: Write the proportion equation
   15,876.72 : 21,906.72 = 9,589.44 : x
2. Step 2: Convert to fraction form
   15,876.72/21,906.72 = 9,589.44/x
3. Step 3: Cross multiply
   15,876.72x = 21,906.72 × 9,589.44
4. Step 4: Simplify right side
   15,876.72x = 210,073,177.04
5. Step 5: Solve for x
   x = 210,073,177.04/15,876.72
6. Step 6: Final answer
   x = 13,231.52