Finding the Fourth Proportional to 1,100.67, 1,649.07 and 666.96

Step by Step Solution

1. Step 1: Write the proportion equation
   1,100.67 : 1,649.07 = 666.96 : x
2. Step 2: Convert to fraction form
   1,100.67/1,649.07 = 666.96/x
3. Step 3: Cross multiply
   1,100.67x = 1,649.07 × 666.96
4. Step 4: Simplify right side
   1,100.67x = 1,099,863.73
5. Step 5: Solve for x
   x = 1,099,863.73/1,100.67
6. Step 6: Final answer
   x = 999.27