Finding the Fourth Proportional to 7,899.56, 10,896.81 and 5,105.06

Step by Step Solution

1. Step 1: Write the proportion equation
   7,899.56 : 10,896.81 = 5,105.06 : x
2. Step 2: Convert to fraction form
   7,899.56/10,896.81 = 5,105.06/x
3. Step 3: Cross multiply
   7,899.56x = 10,896.81 × 5,105.06
4. Step 4: Simplify right side
   7,899.56x = 55,628,814.37
5. Step 5: Solve for x
   x = 55,628,814.37/7,899.56
6. Step 6: Final answer
   x = 7,042.02