Finding the Fourth Proportional to 21,886.25, 30,205.71 and 12,452.99

Step by Step Solution

1. Step 1: Write the proportion equation
   21,886.25 : 30,205.71 = 12,452.99 : x
2. Step 2: Convert to fraction form
   21,886.25/30,205.71 = 12,452.99/x
3. Step 3: Cross multiply
   21,886.25x = 30,205.71 × 12,452.99
4. Step 4: Simplify right side
   21,886.25x = 376,151,253.54
5. Step 5: Solve for x
   x = 376,151,253.54/21,886.25
6. Step 6: Final answer
   x = 17,186.65