Finding the Fourth Proportional to 21,620.30, 29,834.72 and 12,544.96

Step by Step Solution

1. Step 1: Write the proportion equation
   21,620.30 : 29,834.72 = 12,544.96 : x
2. Step 2: Convert to fraction form
   21,620.30/29,834.72 = 12,544.96/x
3. Step 3: Cross multiply
   21,620.30x = 29,834.72 × 12,544.96
4. Step 4: Simplify right side
   21,620.30x = 374,275,157.11
5. Step 5: Solve for x
   x = 374,275,157.11/21,620.30
6. Step 6: Final answer
   x = 17,311.29