Finding the Fourth Proportional to 13,665.16, 18,855.84 and 7,696.45

Step by Step Solution

1. Step 1: Write the proportion equation
   13,665.16 : 18,855.84 = 7,696.45 : x
2. Step 2: Convert to fraction form
   13,665.16/18,855.84 = 7,696.45/x
3. Step 3: Cross multiply
   13,665.16x = 18,855.84 × 7,696.45
4. Step 4: Simplify right side
   13,665.16x = 145,123,029.77
5. Step 5: Solve for x
   x = 145,123,029.77/13,665.16
6. Step 6: Final answer
   x = 10,619.93