Finding the Fourth Proportional to 21,768.21, 30,100.43 and 17,284.05

Step by Step Solution

1. Step 1: Write the proportion equation
   21,768.21 : 30,100.43 = 17,284.05 : x
2. Step 2: Convert to fraction form
   21,768.21/30,100.43 = 17,284.05/x
3. Step 3: Cross multiply
   21,768.21x = 30,100.43 × 17,284.05
4. Step 4: Simplify right side
   21,768.21x = 520,257,250.72
5. Step 5: Solve for x
   x = 520,257,250.72/21,768.21
6. Step 6: Final answer
   x = 23,899.86