Finding the Fourth Proportional to 1,090.67, 1,505.49 and 648.41

Step by Step Solution

1. Step 1: Write the proportion equation
   1,090.67 : 1,505.49 = 648.41 : x
2. Step 2: Convert to fraction form
   1,090.67/1,505.49 = 648.41/x
3. Step 3: Cross multiply
   1,090.67x = 1,505.49 × 648.41
4. Step 4: Simplify right side
   1,090.67x = 976,174.77
5. Step 5: Solve for x
   x = 976,174.77/1,090.67
6. Step 6: Final answer
   x = 895.02