Finding the Fourth Proportional to 21,848.58, 30,153.60 and 12,418.56

Step by Step Solution

1. Step 1: Write the proportion equation
   21,848.58 : 30,153.60 = 12,418.56 : x
2. Step 2: Convert to fraction form
   21,848.58/30,153.60 = 12,418.56/x
3. Step 3: Cross multiply
   21,848.58x = 30,153.60 × 12,418.56
4. Step 4: Simplify right side
   21,848.58x = 374,464,290.82
5. Step 5: Solve for x
   x = 374,464,290.82/21,848.58
6. Step 6: Final answer
   x = 17,139.07