Finding the Fourth Proportional to 1,003.99, 1,384.24 and 649.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,003.99 : 1,384.24 = 649.31 : x
2. Step 2: Convert to fraction form
   1,003.99/1,384.24 = 649.31/x
3. Step 3: Cross multiply
   1,003.99x = 1,384.24 × 649.31
4. Step 4: Simplify right side
   1,003.99x = 898,800.87
5. Step 5: Solve for x
   x = 898,800.87/1,003.99
6. Step 6: Final answer
   x = 895.23