Finding the Fourth Proportional to 8,269.47, 12,375.60 and 5,105.61

Step by Step Solution

1. Step 1: Write the proportion equation
   8,269.47 : 12,375.60 = 5,105.61 : x
2. Step 2: Convert to fraction form
   8,269.47/12,375.60 = 5,105.61/x
3. Step 3: Cross multiply
   8,269.47x = 12,375.60 × 5,105.61
4. Step 4: Simplify right side
   8,269.47x = 63,184,987.12
5. Step 5: Solve for x
   x = 63,184,987.12/8,269.47
6. Step 6: Final answer
   x = 7,640.75