Finding the Fourth Proportional to 1,768.72, 2,440.86 and 982.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,768.72 : 2,440.86 = 982.78 : x
2. Step 2: Convert to fraction form
   1,768.72/2,440.86 = 982.78/x
3. Step 3: Cross multiply
   1,768.72x = 2,440.86 × 982.78
4. Step 4: Simplify right side
   1,768.72x = 2,398,828.39
5. Step 5: Solve for x
   x = 2,398,828.39/1,768.72
6. Step 6: Final answer
   x = 1,356.25