Finding the Fourth Proportional to 18,485, 25,500.38 and 12,108.81

Step by Step Solution

1. Step 1: Write the proportion equation
   18,485 : 25,500.38 = 12,108.81 : x
2. Step 2: Convert to fraction form
   18,485/25,500.38 = 12,108.81/x
3. Step 3: Cross multiply
   18,485x = 25,500.38 × 12,108.81
4. Step 4: Simplify right side
   18,485x = 308,779,256.35
5. Step 5: Solve for x
   x = 308,779,256.35/18,485
6. Step 6: Final answer
   x = 16,704.31