Finding the Fourth Proportional to 2,548.94, 3,825.45 and 989.69

Step by Step Solution

1. Step 1: Write the proportion equation
   2,548.94 : 3,825.45 = 989.69 : x
2. Step 2: Convert to fraction form
   2,548.94/3,825.45 = 989.69/x
3. Step 3: Cross multiply
   2,548.94x = 3,825.45 × 989.69
4. Step 4: Simplify right side
   2,548.94x = 3,785,990.48
5. Step 5: Solve for x
   x = 3,785,990.48/2,548.94
6. Step 6: Final answer
   x = 1,485.32