Finding the Fourth Proportional to 1,101.06, 1,518.78 and 681.54

Step by Step Solution

1. Step 1: Write the proportion equation
   1,101.06 : 1,518.78 = 681.54 : x
2. Step 2: Convert to fraction form
   1,101.06/1,518.78 = 681.54/x
3. Step 3: Cross multiply
   1,101.06x = 1,518.78 × 681.54
4. Step 4: Simplify right side
   1,101.06x = 1,035,109.32
5. Step 5: Solve for x
   x = 1,035,109.32/1,101.06
6. Step 6: Final answer
   x = 940.10