Finding the Fourth Proportional to 12,180.12, 18,256.83 and 7,958.19

Step by Step Solution

1. Step 1: Write the proportion equation
   12,180.12 : 18,256.83 = 7,958.19 : x
2. Step 2: Convert to fraction form
   12,180.12/18,256.83 = 7,958.19/x
3. Step 3: Cross multiply
   12,180.12x = 18,256.83 × 7,958.19
4. Step 4: Simplify right side
   12,180.12x = 145,291,321.94
5. Step 5: Solve for x
   x = 145,291,321.94/12,180.12
6. Step 6: Final answer
   x = 11,928.56