Finding the Fourth Proportional to 1,918.76, 2,648.28 and 1,256.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,918.76 : 2,648.28 = 1,256.18 : x
2. Step 2: Convert to fraction form
   1,918.76/2,648.28 = 1,256.18/x
3. Step 3: Cross multiply
   1,918.76x = 2,648.28 × 1,256.18
4. Step 4: Simplify right side
   1,918.76x = 3,326,716.37
5. Step 5: Solve for x
   x = 3,326,716.37/1,918.76
6. Step 6: Final answer
   x = 1,733.78