Finding the Fourth Proportional to 13,908.38, 19,195.83 and 7,940.30

Step by Step Solution

1. Step 1: Write the proportion equation
   13,908.38 : 19,195.83 = 7,940.30 : x
2. Step 2: Convert to fraction form
   13,908.38/19,195.83 = 7,940.30/x
3. Step 3: Cross multiply
   13,908.38x = 19,195.83 × 7,940.30
4. Step 4: Simplify right side
   13,908.38x = 152,420,648.95
5. Step 5: Solve for x
   x = 152,420,648.95/13,908.38
6. Step 6: Final answer
   x = 10,958.91