Finding the Fourth Proportional to 21,667.80, 29,915.46 and 17,698.44

Step by Step Solution

1. Step 1: Write the proportion equation
   21,667.80 : 29,915.46 = 17,698.44 : x
2. Step 2: Convert to fraction form
   21,667.80/29,915.46 = 17,698.44/x
3. Step 3: Cross multiply
   21,667.80x = 29,915.46 × 17,698.44
4. Step 4: Simplify right side
   21,667.80x = 529,456,973.88
5. Step 5: Solve for x
   x = 529,456,973.88/21,667.80
6. Step 6: Final answer
   x = 24,435.20