Finding the Fourth Proportional to 8,891.34, 12,269.94 and 4,912.17

Step by Step Solution

1. Step 1: Write the proportion equation
   8,891.34 : 12,269.94 = 4,912.17 : x
2. Step 2: Convert to fraction form
   8,891.34/12,269.94 = 4,912.17/x
3. Step 3: Cross multiply
   8,891.34x = 12,269.94 × 4,912.17
4. Step 4: Simplify right side
   8,891.34x = 60,272,031.17
5. Step 5: Solve for x
   x = 60,272,031.17/8,891.34
6. Step 6: Final answer
   x = 6,778.73