Finding the Fourth Proportional to 1,116.80, 1,673.52 and 682.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,116.80 : 1,673.52 = 682.88 : x
2. Step 2: Convert to fraction form
   1,116.80/1,673.52 = 682.88/x
3. Step 3: Cross multiply
   1,116.80x = 1,673.52 × 682.88
4. Step 4: Simplify right side
   1,116.80x = 1,142,813.34
5. Step 5: Solve for x
   x = 1,142,813.34/1,116.80
6. Step 6: Final answer
   x = 1,023.29