Finding the Fourth Proportional to 3,181.14, 4,772.52 and 989.89

Step by Step Solution

1. Step 1: Write the proportion equation
   3,181.14 : 4,772.52 = 989.89 : x
2. Step 2: Convert to fraction form
   3,181.14/4,772.52 = 989.89/x
3. Step 3: Cross multiply
   3,181.14x = 4,772.52 × 989.89
4. Step 4: Simplify right side
   3,181.14x = 4,724,257.89
5. Step 5: Solve for x
   x = 4,724,257.89/3,181.14
6. Step 6: Final answer
   x = 1,485.08