Finding the Fourth Proportional to 21,297.93, 31,950.69 and 7,257.18

Step by Step Solution

1. Step 1: Write the proportion equation
   21,297.93 : 31,950.69 = 7,257.18 : x
2. Step 2: Convert to fraction form
   21,297.93/31,950.69 = 7,257.18/x
3. Step 3: Cross multiply
   21,297.93x = 31,950.69 × 7,257.18
4. Step 4: Simplify right side
   21,297.93x = 231,871,908.45
5. Step 5: Solve for x
   x = 231,871,908.45/21,297.93
6. Step 6: Final answer
   x = 10,887.06