Finding the Fourth Proportional to 7,013.92, 9,678.96 and 3,870.10

Step by Step Solution

1. Step 1: Write the proportion equation
   7,013.92 : 9,678.96 = 3,870.10 : x
2. Step 2: Convert to fraction form
   7,013.92/9,678.96 = 3,870.10/x
3. Step 3: Cross multiply
   7,013.92x = 9,678.96 × 3,870.10
4. Step 4: Simplify right side
   7,013.92x = 37,458,543.10
5. Step 5: Solve for x
   x = 37,458,543.10/7,013.92
6. Step 6: Final answer
   x = 5,340.60