Finding the Fourth Proportional to 1,271.49, 1,906.89 and 654.80

Step by Step Solution

1. Step 1: Write the proportion equation
   1,271.49 : 1,906.89 = 654.80 : x
2. Step 2: Convert to fraction form
   1,271.49/1,906.89 = 654.80/x
3. Step 3: Cross multiply
   1,271.49x = 1,906.89 × 654.80
4. Step 4: Simplify right side
   1,271.49x = 1,248,619.58
5. Step 5: Solve for x
   x = 1,248,619.58/1,271.49
6. Step 6: Final answer
   x = 982.02