Finding the Fourth Proportional to 21,782.76, 30,059.30 and 12,351.12

Step by Step Solution

1. Step 1: Write the proportion equation
   21,782.76 : 30,059.30 = 12,351.12 : x
2. Step 2: Convert to fraction form
   21,782.76/30,059.30 = 12,351.12/x
3. Step 3: Cross multiply
   21,782.76x = 30,059.30 × 12,351.12
4. Step 4: Simplify right side
   21,782.76x = 371,266,021.42
5. Step 5: Solve for x
   x = 371,266,021.42/21,782.76
6. Step 6: Final answer
   x = 17,044.03