Finding the Fourth Proportional to 21,297.72, 29,341.86 and 16,819.86

Step by Step Solution

1. Step 1: Write the proportion equation
   21,297.72 : 29,341.86 = 16,819.86 : x
2. Step 2: Convert to fraction form
   21,297.72/29,341.86 = 16,819.86/x
3. Step 3: Cross multiply
   21,297.72x = 29,341.86 × 16,819.86
4. Step 4: Simplify right side
   21,297.72x = 493,525,977.34
5. Step 5: Solve for x
   x = 493,525,977.34/21,297.72
6. Step 6: Final answer
   x = 23,172.71