Finding the Fourth Proportional to 21,916.88, 30,246.72 and 12,484.16

Step by Step Solution

1. Step 1: Write the proportion equation
   21,916.88 : 30,246.72 = 12,484.16 : x
2. Step 2: Convert to fraction form
   21,916.88/30,246.72 = 12,484.16/x
3. Step 3: Cross multiply
   21,916.88x = 30,246.72 × 12,484.16
4. Step 4: Simplify right side
   21,916.88x = 377,604,891.96
5. Step 5: Solve for x
   x = 377,604,891.96/21,916.88
6. Step 6: Final answer
   x = 17,228.95