Finding the Fourth Proportional to 13,665.35, 18,858.28 and 7,696.46

Step by Step Solution

1. Step 1: Write the proportion equation
   13,665.35 : 18,858.28 = 7,696.46 : x
2. Step 2: Convert to fraction form
   13,665.35/18,858.28 = 7,696.46/x
3. Step 3: Cross multiply
   13,665.35x = 18,858.28 × 7,696.46
4. Step 4: Simplify right side
   13,665.35x = 145,141,969.78
5. Step 5: Solve for x
   x = 145,141,969.78/13,665.35
6. Step 6: Final answer
   x = 10,621.17