Finding the Fourth Proportional to 1,768.40, 2,648.28 and 1,189.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,768.40 : 2,648.28 = 1,189.52 : x
2. Step 2: Convert to fraction form
   1,768.40/2,648.28 = 1,189.52/x
3. Step 3: Cross multiply
   1,768.40x = 2,648.28 × 1,189.52
4. Step 4: Simplify right side
   1,768.40x = 3,150,182.03
5. Step 5: Solve for x
   x = 3,150,182.03/1,768.40
6. Step 6: Final answer
   x = 1,781.37