Finding the Fourth Proportional to 1,003.21, 1,383.82 and 649.01

Step by Step Solution

1. Step 1: Write the proportion equation
   1,003.21 : 1,383.82 = 649.01 : x
2. Step 2: Convert to fraction form
   1,003.21/1,383.82 = 649.01/x
3. Step 3: Cross multiply
   1,003.21x = 1,383.82 × 649.01
4. Step 4: Simplify right side
   1,003.21x = 898,113.02
5. Step 5: Solve for x
   x = 898,113.02/1,003.21
6. Step 6: Final answer
   x = 895.24