Finding the Fourth Proportional to 3,454.34, 5,181.42 and 989.10

Step by Step Solution

1. Step 1: Write the proportion equation
   3,454.34 : 5,181.42 = 989.10 : x
2. Step 2: Convert to fraction form
   3,454.34/5,181.42 = 989.10/x
3. Step 3: Cross multiply
   3,454.34x = 5,181.42 × 989.10
4. Step 4: Simplify right side
   3,454.34x = 5,124,942.52
5. Step 5: Solve for x
   x = 5,124,942.52/3,454.34
6. Step 6: Final answer
   x = 1,483.62