Finding the Fourth Proportional to 1,100.82, 1,518.38 and 680.74

Step by Step Solution

1. Step 1: Write the proportion equation
   1,100.82 : 1,518.38 = 680.74 : x
2. Step 2: Convert to fraction form
   1,100.82/1,518.38 = 680.74/x
3. Step 3: Cross multiply
   1,100.82x = 1,518.38 × 680.74
4. Step 4: Simplify right side
   1,100.82x = 1,033,617.35
5. Step 5: Solve for x
   x = 1,033,617.35/1,100.82
6. Step 6: Final answer
   x = 938.95