Finding the Fourth Proportional to 21,830.63, 30,126.38 and 12,756.52

Step by Step Solution

1. Step 1: Write the proportion equation
   21,830.63 : 30,126.38 = 12,756.52 : x
2. Step 2: Convert to fraction form
   21,830.63/30,126.38 = 12,756.52/x
3. Step 3: Cross multiply
   21,830.63x = 30,126.38 × 12,756.52
4. Step 4: Simplify right side
   21,830.63x = 384,307,814.63
5. Step 5: Solve for x
   x = 384,307,814.63/21,830.63
6. Step 6: Final answer
   x = 17,604.06