Finding the Fourth Proportional to 1,003.10, 1,383.01 and 648.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,003.10 : 1,383.01 = 648.42 : x
2. Step 2: Convert to fraction form
   1,003.10/1,383.01 = 648.42/x
3. Step 3: Cross multiply
   1,003.10x = 1,383.01 × 648.42
4. Step 4: Simplify right side
   1,003.10x = 896,771.34
5. Step 5: Solve for x
   x = 896,771.34/1,003.10
6. Step 6: Final answer
   x = 894.00