Finding the Fourth Proportional to 43,443.84, 65,169.56 and 12,279.09

Step by Step Solution

1. Step 1: Write the proportion equation
   43,443.84 : 65,169.56 = 12,279.09 : x
2. Step 2: Convert to fraction form
   43,443.84/65,169.56 = 12,279.09/x
3. Step 3: Cross multiply
   43,443.84x = 65,169.56 × 12,279.09
4. Step 4: Simplify right side
   43,443.84x = 800,223,167.58
5. Step 5: Solve for x
   x = 800,223,167.58/43,443.84
6. Step 6: Final answer
   x = 18,419.71