Finding the Fourth Proportional to 21,394.86, 29,521.68 and 12,196.50

Step by Step Solution

1. Step 1: Write the proportion equation
   21,394.86 : 29,521.68 = 12,196.50 : x
2. Step 2: Convert to fraction form
   21,394.86/29,521.68 = 12,196.50/x
3. Step 3: Cross multiply
   21,394.86x = 29,521.68 × 12,196.50
4. Step 4: Simplify right side
   21,394.86x = 360,061,170.12
5. Step 5: Solve for x
   x = 360,061,170.12/21,394.86
6. Step 6: Final answer
   x = 16,829.33