Finding the Fourth Proportional to 1,090.42, 1,505.55 and 671.33

Step by Step Solution

1. Step 1: Write the proportion equation
   1,090.42 : 1,505.55 = 671.33 : x
2. Step 2: Convert to fraction form
   1,090.42/1,505.55 = 671.33/x
3. Step 3: Cross multiply
   1,090.42x = 1,505.55 × 671.33
4. Step 4: Simplify right side
   1,090.42x = 1,010,720.88
5. Step 5: Solve for x
   x = 1,010,720.88/1,090.42
6. Step 6: Final answer
   x = 926.91