Finding the Fourth Proportional to 1,109.90, 1,662.73 and 676.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,109.90 : 1,662.73 = 676.15 : x
2. Step 2: Convert to fraction form
   1,109.90/1,662.73 = 676.15/x
3. Step 3: Cross multiply
   1,109.90x = 1,662.73 × 676.15
4. Step 4: Simplify right side
   1,109.90x = 1,124,249.04
5. Step 5: Solve for x
   x = 1,124,249.04/1,109.90
6. Step 6: Final answer
   x = 1,012.93