Finding the Fourth Proportional to 21,876.32, 30,187.52 and 12,442.56

Step by Step Solution

1. Step 1: Write the proportion equation
   21,876.32 : 30,187.52 = 12,442.56 : x
2. Step 2: Convert to fraction form
   21,876.32/30,187.52 = 12,442.56/x
3. Step 3: Cross multiply
   21,876.32x = 30,187.52 × 12,442.56
4. Step 4: Simplify right side
   21,876.32x = 375,610,028.85
5. Step 5: Solve for x
   x = 375,610,028.85/21,876.32
6. Step 6: Final answer
   x = 17,169.71