Finding the Fourth Proportional to 1,636.54, 2,456.89 and 988.54

Step by Step Solution

1. Step 1: Write the proportion equation
   1,636.54 : 2,456.89 = 988.54 : x
2. Step 2: Convert to fraction form
   1,636.54/2,456.89 = 988.54/x
3. Step 3: Cross multiply
   1,636.54x = 2,456.89 × 988.54
4. Step 4: Simplify right side
   1,636.54x = 2,428,734.04
5. Step 5: Solve for x
   x = 2,428,734.04/1,636.54
6. Step 6: Final answer
   x = 1,484.07