Finding the Fourth Proportional to 1,976.42, 2,726.78 and 1,268.21

Step by Step Solution

1. Step 1: Write the proportion equation
   1,976.42 : 2,726.78 = 1,268.21 : x
2. Step 2: Convert to fraction form
   1,976.42/2,726.78 = 1,268.21/x
3. Step 3: Cross multiply
   1,976.42x = 2,726.78 × 1,268.21
4. Step 4: Simplify right side
   1,976.42x = 3,458,130.14
5. Step 5: Solve for x
   x = 3,458,130.14/1,976.42
6. Step 6: Final answer
   x = 1,749.69