Finding the Fourth Proportional to 8,898.44, 12,279.78 and 4,919.72

Step by Step Solution

1. Step 1: Write the proportion equation
   8,898.44 : 12,279.78 = 4,919.72 : x
2. Step 2: Convert to fraction form
   8,898.44/12,279.78 = 4,919.72/x
3. Step 3: Cross multiply
   8,898.44x = 12,279.78 × 4,919.72
4. Step 4: Simplify right side
   8,898.44x = 60,413,017.86
5. Step 5: Solve for x
   x = 60,413,017.86/8,898.44
6. Step 6: Final answer
   x = 6,789.17