Finding the Fourth Proportional to 8,891.62, 12,270.56 and 4,912.82

Step by Step Solution

1. Step 1: Write the proportion equation
   8,891.62 : 12,270.56 = 4,912.82 : x
2. Step 2: Convert to fraction form
   8,891.62/12,270.56 = 4,912.82/x
3. Step 3: Cross multiply
   8,891.62x = 12,270.56 × 4,912.82
4. Step 4: Simplify right side
   8,891.62x = 60,283,095.54
5. Step 5: Solve for x
   x = 60,283,095.54/8,891.62
6. Step 6: Final answer
   x = 6,779.77