Finding the Fourth Proportional to 21,191.63, 31,789.56 and 5,609.25

Step by Step Solution

1. Step 1: Write the proportion equation
   21,191.63 : 31,789.56 = 5,609.25 : x
2. Step 2: Convert to fraction form
   21,191.63/31,789.56 = 5,609.25/x
3. Step 3: Cross multiply
   21,191.63x = 31,789.56 × 5,609.25
4. Step 4: Simplify right side
   21,191.63x = 178,315,610.46
5. Step 5: Solve for x
   x = 178,315,610.46/21,191.63
6. Step 6: Final answer
   x = 8,414.44