Finding the Fourth Proportional to 2,634.08, 3,948.56 and 989.52

Step by Step Solution

1. Step 1: Write the proportion equation
   2,634.08 : 3,948.56 = 989.52 : x
2. Step 2: Convert to fraction form
   2,634.08/3,948.56 = 989.52/x
3. Step 3: Cross multiply
   2,634.08x = 3,948.56 × 989.52
4. Step 4: Simplify right side
   2,634.08x = 3,907,179.09
5. Step 5: Solve for x
   x = 3,907,179.09/2,634.08
6. Step 6: Final answer
   x = 1,483.32