Finding the Fourth Proportional to 21,196.27, 31,789.14 and 6,404.05

Step by Step Solution

1. Step 1: Write the proportion equation
   21,196.27 : 31,789.14 = 6,404.05 : x
2. Step 2: Convert to fraction form
   21,196.27/31,789.14 = 6,404.05/x
3. Step 3: Cross multiply
   21,196.27x = 31,789.14 × 6,404.05
4. Step 4: Simplify right side
   21,196.27x = 203,579,242.02
5. Step 5: Solve for x
   x = 203,579,242.02/21,196.27
6. Step 6: Final answer
   x = 9,604.48