Finding the Fourth Proportional to 8,976.30, 12,388.82 and 5,198.85

Step by Step Solution

1. Step 1: Write the proportion equation
   8,976.30 : 12,388.82 = 5,198.85 : x
2. Step 2: Convert to fraction form
   8,976.30/12,388.82 = 5,198.85/x
3. Step 3: Cross multiply
   8,976.30x = 12,388.82 × 5,198.85
4. Step 4: Simplify right side
   8,976.30x = 64,407,590.86
5. Step 5: Solve for x
   x = 64,407,590.86/8,976.30
6. Step 6: Final answer
   x = 7,175.29