Finding the Fourth Proportional to 21,922.04, 30,250.78 and 12,488.76

Step by Step Solution

1. Step 1: Write the proportion equation
   21,922.04 : 30,250.78 = 12,488.76 : x
2. Step 2: Convert to fraction form
   21,922.04/30,250.78 = 12,488.76/x
3. Step 3: Cross multiply
   21,922.04x = 30,250.78 × 12,488.76
4. Step 4: Simplify right side
   21,922.04x = 377,794,731.23
5. Step 5: Solve for x
   x = 377,794,731.23/21,922.04
6. Step 6: Final answer
   x = 17,233.56