Finding the Fourth Proportional to 1,768.78, 2,649.55 and 841.53

Step by Step Solution

1. Step 1: Write the proportion equation
   1,768.78 : 2,649.55 = 841.53 : x
2. Step 2: Convert to fraction form
   1,768.78/2,649.55 = 841.53/x
3. Step 3: Cross multiply
   1,768.78x = 2,649.55 × 841.53
4. Step 4: Simplify right side
   1,768.78x = 2,229,675.81
5. Step 5: Solve for x
   x = 2,229,675.81/1,768.78
6. Step 6: Final answer
   x = 1,260.58