Finding the Fourth Proportional to 18,348.63, 25,321.71 and 10,390.69

Step by Step Solution

1. Step 1: Write the proportion equation
   18,348.63 : 25,321.71 = 10,390.69 : x
2. Step 2: Convert to fraction form
   18,348.63/25,321.71 = 10,390.69/x
3. Step 3: Cross multiply
   18,348.63x = 25,321.71 × 10,390.69
4. Step 4: Simplify right side
   18,348.63x = 263,109,908.61
5. Step 5: Solve for x
   x = 263,109,908.61/18,348.63
6. Step 6: Final answer
   x = 14,339.48