Finding the Fourth Proportional to 21,992.90, 30,353.50 and 17,312.42

Step by Step Solution

1. Step 1: Write the proportion equation
   21,992.90 : 30,353.50 = 17,312.42 : x
2. Step 2: Convert to fraction form
   21,992.90/30,353.50 = 17,312.42/x
3. Step 3: Cross multiply
   21,992.90x = 30,353.50 × 17,312.42
4. Step 4: Simplify right side
   21,992.90x = 525,492,540.47
5. Step 5: Solve for x
   x = 525,492,540.47/21,992.90
6. Step 6: Final answer
   x = 23,893.74