Finding the Fourth Proportional to 7,013.69, 9,678.89 and 3,869.88

Step by Step Solution

1. Step 1: Write the proportion equation
   7,013.69 : 9,678.89 = 3,869.88 : x
2. Step 2: Convert to fraction form
   7,013.69/9,678.89 = 3,869.88/x
3. Step 3: Cross multiply
   7,013.69x = 9,678.89 × 3,869.88
4. Step 4: Simplify right side
   7,013.69x = 37,456,142.83
5. Step 5: Solve for x
   x = 37,456,142.83/7,013.69
6. Step 6: Final answer
   x = 5,340.43