Finding the Fourth Proportional to 13,910.57, 19,196.90 and 7,942.12

Step by Step Solution

1. Step 1: Write the proportion equation
   13,910.57 : 19,196.90 = 7,942.12 : x
2. Step 2: Convert to fraction form
   13,910.57/19,196.90 = 7,942.12/x
3. Step 3: Cross multiply
   13,910.57x = 19,196.90 × 7,942.12
4. Step 4: Simplify right side
   13,910.57x = 152,464,083.43
5. Step 5: Solve for x
   x = 152,464,083.43/13,910.57
6. Step 6: Final answer
   x = 10,960.30