Finding the Fourth Proportional to 1,679.40, 2,514.78 and 1,100.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,679.40 : 2,514.78 = 1,100.52 : x
2. Step 2: Convert to fraction form
   1,679.40/2,514.78 = 1,100.52/x
3. Step 3: Cross multiply
   1,679.40x = 2,514.78 × 1,100.52
4. Step 4: Simplify right side
   1,679.40x = 2,767,565.69
5. Step 5: Solve for x
   x = 2,767,565.69/1,679.40
6. Step 6: Final answer
   x = 1,647.95