Finding the Fourth Proportional to 21,004.66, 31,510.19 and 7,150.42

Step by Step Solution

1. Step 1: Write the proportion equation
   21,004.66 : 31,510.19 = 7,150.42 : x
2. Step 2: Convert to fraction form
   21,004.66/31,510.19 = 7,150.42/x
3. Step 3: Cross multiply
   21,004.66x = 31,510.19 × 7,150.42
4. Step 4: Simplify right side
   21,004.66x = 225,311,057.03
5. Step 5: Solve for x
   x = 225,311,057.03/21,004.66
6. Step 6: Final answer
   x = 10,726.72