Finding the Fourth Proportional to 21,929.52, 30,262.72 and 11,857.94

Step by Step Solution

1. Step 1: Write the proportion equation
   21,929.52 : 30,262.72 = 11,857.94 : x
2. Step 2: Convert to fraction form
   21,929.52/30,262.72 = 11,857.94/x
3. Step 3: Cross multiply
   21,929.52x = 30,262.72 × 11,857.94
4. Step 4: Simplify right side
   21,929.52x = 358,853,461.64
5. Step 5: Solve for x
   x = 358,853,461.64/21,929.52
6. Step 6: Final answer
   x = 16,363.94