Finding the Fourth Proportional to 22,333.74, 30,821.10 and 12,642.42

Step by Step Solution

1. Step 1: Write the proportion equation
   22,333.74 : 30,821.10 = 12,642.42 : x
2. Step 2: Convert to fraction form
   22,333.74/30,821.10 = 12,642.42/x
3. Step 3: Cross multiply
   22,333.74x = 30,821.10 × 12,642.42
4. Step 4: Simplify right side
   22,333.74x = 389,653,291.06
5. Step 5: Solve for x
   x = 389,653,291.06/22,333.74
6. Step 6: Final answer
   x = 17,446.84