Finding the Fourth Proportional to 18,665,291.36, 25,743,499.88 and 12,141,004.20

Step by Step Solution

1. Step 1: Write the proportion equation
   18,665,291.36 : 25,743,499.88 = 12,141,004.20 : x
2. Step 2: Convert to fraction form
   18,665,291.36/25,743,499.88 = 12,141,004.20/x
3. Step 3: Cross multiply
   18,665,291.36x = 25,743,499.88 × 12,141,004.20
4. Step 4: Simplify right side
   18,665,291.36x = 312,551,940,105,074.44
5. Step 5: Solve for x
   x = 312,551,940,105,074.44/18,665,291.36
6. Step 6: Final answer
   x = 16,745,087.67