Finding the Fourth Proportional to 12,815.94, 19,224.49 and 3,930.62

Step by Step Solution

1. Step 1: Write the proportion equation
   12,815.94 : 19,224.49 = 3,930.62 : x
2. Step 2: Convert to fraction form
   12,815.94/19,224.49 = 3,930.62/x
3. Step 3: Cross multiply
   12,815.94x = 19,224.49 × 3,930.62
4. Step 4: Simplify right side
   12,815.94x = 75,564,164.88
5. Step 5: Solve for x
   x = 75,564,164.88/12,815.94
6. Step 6: Final answer
   x = 5,896.11