Finding the Fourth Proportional to 21,936.12, 30,271.72 and 11,864.55

Step by Step Solution

1. Step 1: Write the proportion equation
   21,936.12 : 30,271.72 = 11,864.55 : x
2. Step 2: Convert to fraction form
   21,936.12/30,271.72 = 11,864.55/x
3. Step 3: Cross multiply
   21,936.12x = 30,271.72 × 11,864.55
4. Step 4: Simplify right side
   21,936.12x = 359,160,335.53
5. Step 5: Solve for x
   x = 359,160,335.53/21,936.12
6. Step 6: Final answer
   x = 16,373.01