Finding the Fourth Proportional to 1,404.98, 2,107.02 and 664.49

Step by Step Solution

1. Step 1: Write the proportion equation
   1,404.98 : 2,107.02 = 664.49 : x
2. Step 2: Convert to fraction form
   1,404.98/2,107.02 = 664.49/x
3. Step 3: Cross multiply
   1,404.98x = 2,107.02 × 664.49
4. Step 4: Simplify right side
   1,404.98x = 1,400,093.72
5. Step 5: Solve for x
   x = 1,400,093.72/1,404.98
6. Step 6: Final answer
   x = 996.52