Finding the Fourth Proportional to 21,196.23, 31,772.16 and 7,151.42

Step by Step Solution

1. Step 1: Write the proportion equation
   21,196.23 : 31,772.16 = 7,151.42 : x
2. Step 2: Convert to fraction form
   21,196.23/31,772.16 = 7,151.42/x
3. Step 3: Cross multiply
   21,196.23x = 31,772.16 × 7,151.42
4. Step 4: Simplify right side
   21,196.23x = 227,215,901.61
5. Step 5: Solve for x
   x = 227,215,901.61/21,196.23
6. Step 6: Final answer
   x = 10,719.64