Finding the Fourth Proportional to 1,106.82, 1,659.15 and 618.80

Step by Step Solution

1. Step 1: Write the proportion equation
   1,106.82 : 1,659.15 = 618.80 : x
2. Step 2: Convert to fraction form
   1,106.82/1,659.15 = 618.80/x
3. Step 3: Cross multiply
   1,106.82x = 1,659.15 × 618.80
4. Step 4: Simplify right side
   1,106.82x = 1,026,673.72
5. Step 5: Solve for x
   x = 1,026,673.72/1,106.82
6. Step 6: Final answer
   x = 927.59