Finding the Fourth Proportional to 21,196.22, 31,791.29 and 7,154.39

Step by Step Solution

1. Step 1: Write the proportion equation
   21,196.22 : 31,791.29 = 7,154.39 : x
2. Step 2: Convert to fraction form
   21,196.22/31,791.29 = 7,154.39/x
3. Step 3: Cross multiply
   21,196.22x = 31,791.29 × 7,154.39
4. Step 4: Simplify right side
   21,196.22x = 227,447,443.30
5. Step 5: Solve for x
   x = 227,447,443.30/21,196.22
6. Step 6: Final answer
   x = 10,730.57