Finding the Fourth Proportional to 1,764.82, 2,645.22 and 839.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,764.82 : 2,645.22 = 839.10 : x
2. Step 2: Convert to fraction form
   1,764.82/2,645.22 = 839.10/x
3. Step 3: Cross multiply
   1,764.82x = 2,645.22 × 839.10
4. Step 4: Simplify right side
   1,764.82x = 2,219,604.10
5. Step 5: Solve for x
   x = 2,219,604.10/1,764.82
6. Step 6: Final answer
   x = 1,257.69