Finding the Fourth Proportional to 11,842.18, 17,759.42 and 3,942.57

Step by Step Solution

1. Step 1: Write the proportion equation
   11,842.18 : 17,759.42 = 3,942.57 : x
2. Step 2: Convert to fraction form
   11,842.18/17,759.42 = 3,942.57/x
3. Step 3: Cross multiply
   11,842.18x = 17,759.42 × 3,942.57
4. Step 4: Simplify right side
   11,842.18x = 70,017,810.76
5. Step 5: Solve for x
   x = 70,017,810.76/11,842.18
6. Step 6: Final answer
   x = 5,912.58