Finding the Fourth Proportional to 21,801.47, 30,086.61 and 12,242.12

Step by Step Solution

1. Step 1: Write the proportion equation
   21,801.47 : 30,086.61 = 12,242.12 : x
2. Step 2: Convert to fraction form
   21,801.47/30,086.61 = 12,242.12/x
3. Step 3: Cross multiply
   21,801.47x = 30,086.61 × 12,242.12
4. Step 4: Simplify right side
   21,801.47x = 368,323,890.01
5. Step 5: Solve for x
   x = 368,323,890.01/21,801.47
6. Step 6: Final answer
   x = 16,894.45