Finding the Fourth Proportional to 7,013.56, 9,678.56 and 3,870.04

Step by Step Solution

1. Step 1: Write the proportion equation
   7,013.56 : 9,678.56 = 3,870.04 : x
2. Step 2: Convert to fraction form
   7,013.56/9,678.56 = 3,870.04/x
3. Step 3: Cross multiply
   7,013.56x = 9,678.56 × 3,870.04
4. Step 4: Simplify right side
   7,013.56x = 37,456,414.34
5. Step 5: Solve for x
   x = 37,456,414.34/7,013.56
6. Step 6: Final answer
   x = 5,340.57