Finding the Fourth Proportional to 1,918.48, 2,648.72 and 1,256.46

Step by Step Solution

1. Step 1: Write the proportion equation
   1,918.48 : 2,648.72 = 1,256.46 : x
2. Step 2: Convert to fraction form
   1,918.48/2,648.72 = 1,256.46/x
3. Step 3: Cross multiply
   1,918.48x = 2,648.72 × 1,256.46
4. Step 4: Simplify right side
   1,918.48x = 3,328,010.73
5. Step 5: Solve for x
   x = 3,328,010.73/1,918.48
6. Step 6: Final answer
   x = 1,734.71