Finding the Fourth Proportional to 21,868.22, 30,178.24 and 12,436.58

Step by Step Solution

1. Step 1: Write the proportion equation
   21,868.22 : 30,178.24 = 12,436.58 : x
2. Step 2: Convert to fraction form
   21,868.22/30,178.24 = 12,436.58/x
3. Step 3: Cross multiply
   21,868.22x = 30,178.24 × 12,436.58
4. Step 4: Simplify right side
   21,868.22x = 375,314,096.02
5. Step 5: Solve for x
   x = 375,314,096.02/21,868.22
6. Step 6: Final answer
   x = 17,162.54