Finding the Fourth Proportional to 8,139.69, 11,228.72 and 5,482.49

Step by Step Solution

1. Step 1: Write the proportion equation
   8,139.69 : 11,228.72 = 5,482.49 : x
2. Step 2: Convert to fraction form
   8,139.69/11,228.72 = 5,482.49/x
3. Step 3: Cross multiply
   8,139.69x = 11,228.72 × 5,482.49
4. Step 4: Simplify right side
   8,139.69x = 61,561,261.56
5. Step 5: Solve for x
   x = 61,561,261.56/8,139.69
6. Step 6: Final answer
   x = 7,563.10