Finding the Fourth Proportional to 8,669.56, 13,013.31 and 5,340.20

Step by Step Solution

1. Step 1: Write the proportion equation
   8,669.56 : 13,013.31 = 5,340.20 : x
2. Step 2: Convert to fraction form
   8,669.56/13,013.31 = 5,340.20/x
3. Step 3: Cross multiply
   8,669.56x = 13,013.31 × 5,340.20
4. Step 4: Simplify right side
   8,669.56x = 69,493,678.06
5. Step 5: Solve for x
   x = 69,493,678.06/8,669.56
6. Step 6: Final answer
   x = 8,015.83