Finding the Fourth Proportional to 8,127.82, 12,185.85 and 5,488.78

Step by Step Solution

1. Step 1: Write the proportion equation
   8,127.82 : 12,185.85 = 5,488.78 : x
2. Step 2: Convert to fraction form
   8,127.82/12,185.85 = 5,488.78/x
3. Step 3: Cross multiply
   8,127.82x = 12,185.85 × 5,488.78
4. Step 4: Simplify right side
   8,127.82x = 66,885,449.76
5. Step 5: Solve for x
   x = 66,885,449.76/8,127.82
6. Step 6: Final answer
   x = 8,229.20