Finding the Fourth Proportional to 1,768.28, 2,648.80 and 841.03

Step by Step Solution

1. Step 1: Write the proportion equation
   1,768.28 : 2,648.80 = 841.03 : x
2. Step 2: Convert to fraction form
   1,768.28/2,648.80 = 841.03/x
3. Step 3: Cross multiply
   1,768.28x = 2,648.80 × 841.03
4. Step 4: Simplify right side
   1,768.28x = 2,227,714.69
5. Step 5: Solve for x
   x = 2,227,714.69/1,768.28
6. Step 6: Final answer
   x = 1,259.82