Finding the Fourth Proportional to 21,994.08, 30,357.42 and 12,568.20

Step by Step Solution

1. Step 1: Write the proportion equation
   21,994.08 : 30,357.42 = 12,568.20 : x
2. Step 2: Convert to fraction form
   21,994.08/30,357.42 = 12,568.20/x
3. Step 3: Cross multiply
   21,994.08x = 30,357.42 × 12,568.20
4. Step 4: Simplify right side
   21,994.08x = 381,538,126.04
5. Step 5: Solve for x
   x = 381,538,126.04/21,994.08
6. Step 6: Final answer
   x = 17,347.31