Finding the Fourth Proportional to 25,606.91, 38,411.58 and 12,443.60

Step by Step Solution

1. Step 1: Write the proportion equation
   25,606.91 : 38,411.58 = 12,443.60 : x
2. Step 2: Convert to fraction form
   25,606.91/38,411.58 = 12,443.60/x
3. Step 3: Cross multiply
   25,606.91x = 38,411.58 × 12,443.60
4. Step 4: Simplify right side
   25,606.91x = 477,978,336.89
5. Step 5: Solve for x
   x = 477,978,336.89/25,606.91
6. Step 6: Final answer
   x = 18,665.99