Finding the Fourth Proportional to 8,898.69, 12,279.59 and 4,919.27

Step by Step Solution

1. Step 1: Write the proportion equation
   8,898.69 : 12,279.59 = 4,919.27 : x
2. Step 2: Convert to fraction form
   8,898.69/12,279.59 = 4,919.27/x
3. Step 3: Cross multiply
   8,898.69x = 12,279.59 × 4,919.27
4. Step 4: Simplify right side
   8,898.69x = 60,406,557.30
5. Step 5: Solve for x
   x = 60,406,557.30/8,898.69
6. Step 6: Final answer
   x = 6,788.25