Finding the Fourth Proportional to 12,122.88, 18,178.56 and 3,912.96

Step by Step Solution

1. Step 1: Write the proportion equation
   12,122.88 : 18,178.56 = 3,912.96 : x
2. Step 2: Convert to fraction form
   12,122.88/18,178.56 = 3,912.96/x
3. Step 3: Cross multiply
   12,122.88x = 18,178.56 × 3,912.96
4. Step 4: Simplify right side
   12,122.88x = 71,131,978.14
5. Step 5: Solve for x
   x = 71,131,978.14/12,122.88
6. Step 6: Final answer
   x = 5,867.58