Finding the Fourth Proportional to 25,288.48, 37,913.94 and 12,128.32

Step by Step Solution

1. Step 1: Write the proportion equation
   25,288.48 : 37,913.94 = 12,128.32 : x
2. Step 2: Convert to fraction form
   25,288.48/37,913.94 = 12,128.32/x
3. Step 3: Cross multiply
   25,288.48x = 37,913.94 × 12,128.32
4. Step 4: Simplify right side
   25,288.48x = 459,832,396.78
5. Step 5: Solve for x
   x = 459,832,396.78/25,288.48
6. Step 6: Final answer
   x = 18,183.47