Finding the Fourth Proportional to 1,003.00, 1,384.58 and 644.46

Step by Step Solution

1. Step 1: Write the proportion equation
   1,003.00 : 1,384.58 = 644.46 : x
2. Step 2: Convert to fraction form
   1,003.00/1,384.58 = 644.46/x
3. Step 3: Cross multiply
   1,003.00x = 1,384.58 × 644.46
4. Step 4: Simplify right side
   1,003.00x = 892,310.90
5. Step 5: Solve for x
   x = 892,310.90/1,003.00
6. Step 6: Final answer
   x = 889.65