Finding the Fourth Proportional to 1,100.78, 1,651.18 and 451.26

Step by Step Solution

1. Step 1: Write the proportion equation
   1,100.78 : 1,651.18 = 451.26 : x
2. Step 2: Convert to fraction form
   1,100.78/1,651.18 = 451.26/x
3. Step 3: Cross multiply
   1,100.78x = 1,651.18 × 451.26
4. Step 4: Simplify right side
   1,100.78x = 745,111.49
5. Step 5: Solve for x
   x = 745,111.49/1,100.78
6. Step 6: Final answer
   x = 676.89