Finding the Fourth Proportional to 21,858.43, 30,164.29 and 12,297.59

Step by Step Solution

1. Step 1: Write the proportion equation
   21,858.43 : 30,164.29 = 12,297.59 : x
2. Step 2: Convert to fraction form
   21,858.43/30,164.29 = 12,297.59/x
3. Step 3: Cross multiply
   21,858.43x = 30,164.29 × 12,297.59
4. Step 4: Simplify right side
   21,858.43x = 370,948,071.06
5. Step 5: Solve for x
   x = 370,948,071.06/21,858.43
6. Step 6: Final answer
   x = 16,970.48