Finding the Fourth Proportional to 1,105.41, 1,649.04 and 1,080.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,105.41 : 1,649.04 = 1,080.30 : x
2. Step 2: Convert to fraction form
   1,105.41/1,649.04 = 1,080.30/x
3. Step 3: Cross multiply
   1,105.41x = 1,649.04 × 1,080.30
4. Step 4: Simplify right side
   1,105.41x = 1,781,457.91
5. Step 5: Solve for x
   x = 1,781,457.91/1,105.41
6. Step 6: Final answer
   x = 1,611.58