Finding the Fourth Proportional to 13,665.28, 18,857.71 and 7,696.83

Step by Step Solution

1. Step 1: Write the proportion equation
   13,665.28 : 18,857.71 = 7,696.83 : x
2. Step 2: Convert to fraction form
   13,665.28/18,857.71 = 7,696.83/x
3. Step 3: Cross multiply
   13,665.28x = 18,857.71 × 7,696.83
4. Step 4: Simplify right side
   13,665.28x = 145,144,588.06
5. Step 5: Solve for x
   x = 145,144,588.06/13,665.28
6. Step 6: Final answer
   x = 10,621.41