Finding the Fourth Proportional to 21,073.94, 31,607.72 and 7,923.23

Step by Step Solution

1. Step 1: Write the proportion equation
   21,073.94 : 31,607.72 = 7,923.23 : x
2. Step 2: Convert to fraction form
   21,073.94/31,607.72 = 7,923.23/x
3. Step 3: Cross multiply
   21,073.94x = 31,607.72 × 7,923.23
4. Step 4: Simplify right side
   21,073.94x = 250,435,363.72
5. Step 5: Solve for x
   x = 250,435,363.72/21,073.94
6. Step 6: Final answer
   x = 11,883.65