Finding the Fourth Proportional to 13,736.82, 18,957.18 and 7,769.38

Step by Step Solution

1. Step 1: Write the proportion equation
   13,736.82 : 18,957.18 = 7,769.38 : x
2. Step 2: Convert to fraction form
   13,736.82/18,957.18 = 7,769.38/x
3. Step 3: Cross multiply
   13,736.82x = 18,957.18 × 7,769.38
4. Step 4: Simplify right side
   13,736.82x = 147,285,535.15
5. Step 5: Solve for x
   x = 147,285,535.15/13,736.82
6. Step 6: Final answer
   x = 10,721.95