Finding the Fourth Proportional to 8,890.51, 12,269.43 and 4,911.69

Step by Step Solution

1. Step 1: Write the proportion equation
   8,890.51 : 12,269.43 = 4,911.69 : x
2. Step 2: Convert to fraction form
   8,890.51/12,269.43 = 4,911.69/x
3. Step 3: Cross multiply
   8,890.51x = 12,269.43 × 4,911.69
4. Step 4: Simplify right side
   8,890.51x = 60,263,636.64
5. Step 5: Solve for x
   x = 60,263,636.64/8,890.51
6. Step 6: Final answer
   x = 6,778.42