Finding the Fourth Proportional to 7,013.69, 9,679.09 and 3,870.08

Step by Step Solution

1. Step 1: Write the proportion equation
   7,013.69 : 9,679.09 = 3,870.08 : x
2. Step 2: Convert to fraction form
   7,013.69/9,679.09 = 3,870.08/x
3. Step 3: Cross multiply
   7,013.69x = 9,679.09 × 3,870.08
4. Step 4: Simplify right side
   7,013.69x = 37,458,852.63
5. Step 5: Solve for x
   x = 37,458,852.63/7,013.69
6. Step 6: Final answer
   x = 5,340.82