Finding the Fourth Proportional to 8,890.86, 12,269.38 and 4,911.96

Step by Step Solution

1. Step 1: Write the proportion equation
   8,890.86 : 12,269.38 = 4,911.96 : x
2. Step 2: Convert to fraction form
   8,890.86/12,269.38 = 4,911.96/x
3. Step 3: Cross multiply
   8,890.86x = 12,269.38 × 4,911.96
4. Step 4: Simplify right side
   8,890.86x = 60,266,703.78
5. Step 5: Solve for x
   x = 60,266,703.78/8,890.86
6. Step 6: Final answer
   x = 6,778.50