Finding the Fourth Proportional to 22,338.72, 30,829.89 and 12,779.49

Step by Step Solution

1. Step 1: Write the proportion equation
   22,338.72 : 30,829.89 = 12,779.49 : x
2. Step 2: Convert to fraction form
   22,338.72/30,829.89 = 12,779.49/x
3. Step 3: Cross multiply
   22,338.72x = 30,829.89 × 12,779.49
4. Step 4: Simplify right side
   22,338.72x = 393,990,434.49
5. Step 5: Solve for x
   x = 393,990,434.49/22,338.72
6. Step 6: Final answer
   x = 17,637.11