Finding the Fourth Proportional to 22,429.40, 30,950.76 and 12,998.56

Step by Step Solution

1. Step 1: Write the proportion equation
   22,429.40 : 30,950.76 = 12,998.56 : x
2. Step 2: Convert to fraction form
   22,429.40/30,950.76 = 12,998.56/x
3. Step 3: Cross multiply
   22,429.40x = 30,950.76 × 12,998.56
4. Step 4: Simplify right side
   22,429.40x = 402,315,310.91
5. Step 5: Solve for x
   x = 402,315,310.91/22,429.40
6. Step 6: Final answer
   x = 17,936.96