Finding the Fourth Proportional to 9,139.10, 13,706.49 and 3,942.14

Step by Step Solution

1. Step 1: Write the proportion equation
   9,139.10 : 13,706.49 = 3,942.14 : x
2. Step 2: Convert to fraction form
   9,139.10/13,706.49 = 3,942.14/x
3. Step 3: Cross multiply
   9,139.10x = 13,706.49 × 3,942.14
4. Step 4: Simplify right side
   9,139.10x = 54,032,902.49
5. Step 5: Solve for x
   x = 54,032,902.49/9,139.10
6. Step 6: Final answer
   x = 5,912.28