Finding the Fourth Proportional to 12,146.64, 18,222.52 and 3,938

Step by Step Solution

1. Step 1: Write the proportion equation
   12,146.64 : 18,222.52 = 3,938 : x
2. Step 2: Convert to fraction form
   12,146.64/18,222.52 = 3,938/x
3. Step 3: Cross multiply
   12,146.64x = 18,222.52 × 3,938
4. Step 4: Simplify right side
   12,146.64x = 71,760,283.76
5. Step 5: Solve for x
   x = 71,760,283.76/12,146.64
6. Step 6: Final answer
   x = 5,907.83