Finding the Fourth Proportional to 8,891.82, 12,270.82 and 4,912.90

Step by Step Solution

1. Step 1: Write the proportion equation
   8,891.82 : 12,270.82 = 4,912.90 : x
2. Step 2: Convert to fraction form
   8,891.82/12,270.82 = 4,912.90/x
3. Step 3: Cross multiply
   8,891.82x = 12,270.82 × 4,912.90
4. Step 4: Simplify right side
   8,891.82x = 60,285,250.22
5. Step 5: Solve for x
   x = 60,285,250.22/8,891.82
6. Step 6: Final answer
   x = 6,779.85