Finding the Fourth Proportional to 21,175.34, 31,754.94 and 7,131.60

Step by Step Solution

1. Step 1: Write the proportion equation
   21,175.34 : 31,754.94 = 7,131.60 : x
2. Step 2: Convert to fraction form
   21,175.34/31,754.94 = 7,131.60/x
3. Step 3: Cross multiply
   21,175.34x = 31,754.94 × 7,131.60
4. Step 4: Simplify right side
   21,175.34x = 226,463,592.67
5. Step 5: Solve for x
   x = 226,463,592.67/21,175.34
6. Step 6: Final answer
   x = 10,694.68