Finding the Fourth Proportional to 12,264.42, 18,390.83 and 3,942.20

Step by Step Solution

1. Step 1: Write the proportion equation
   12,264.42 : 18,390.83 = 3,942.20 : x
2. Step 2: Convert to fraction form
   12,264.42/18,390.83 = 3,942.20/x
3. Step 3: Cross multiply
   12,264.42x = 18,390.83 × 3,942.20
4. Step 4: Simplify right side
   12,264.42x = 72,500,218.36
5. Step 5: Solve for x
   x = 72,500,218.36/12,264.42
6. Step 6: Final answer
   x = 5,911.43