Finding the Fourth Proportional to 21,196.04, 31,797.40 and 6,403.12

Step by Step Solution

1. Step 1: Write the proportion equation
   21,196.04 : 31,797.40 = 6,403.12 : x
2. Step 2: Convert to fraction form
   21,196.04/31,797.40 = 6,403.12/x
3. Step 3: Cross multiply
   21,196.04x = 31,797.40 × 6,403.12
4. Step 4: Simplify right side
   21,196.04x = 203,602,567.89
5. Step 5: Solve for x
   x = 203,602,567.89/21,196.04
6. Step 6: Final answer
   x = 9,605.69