Finding the Fourth Proportional to 21,172.27, 31,763.25 and 7,131.94

Step by Step Solution

1. Step 1: Write the proportion equation
   21,172.27 : 31,763.25 = 7,131.94 : x
2. Step 2: Convert to fraction form
   21,172.27/31,763.25 = 7,131.94/x
3. Step 3: Cross multiply
   21,172.27x = 31,763.25 × 7,131.94
4. Step 4: Simplify right side
   21,172.27x = 226,533,593.21
5. Step 5: Solve for x
   x = 226,533,593.21/21,172.27
6. Step 6: Final answer
   x = 10,699.54