Finding the Fourth Proportional to 13,279.20, 18,323.18 and 7,612.86

Step by Step Solution

1. Step 1: Write the proportion equation
   13,279.20 : 18,323.18 = 7,612.86 : x
2. Step 2: Convert to fraction form
   13,279.20/18,323.18 = 7,612.86/x
3. Step 3: Cross multiply
   13,279.20x = 18,323.18 × 7,612.86
4. Step 4: Simplify right side
   13,279.20x = 139,491,766.03
5. Step 5: Solve for x
   x = 139,491,766.03/13,279.20
6. Step 6: Final answer
   x = 10,504.53