Finding the Fourth Proportional to 1,644.72, 2,467.06 and 490.47

Step by Step Solution

1. Step 1: Write the proportion equation
   1,644.72 : 2,467.06 = 490.47 : x
2. Step 2: Convert to fraction form
   1,644.72/2,467.06 = 490.47/x
3. Step 3: Cross multiply
   1,644.72x = 2,467.06 × 490.47
4. Step 4: Simplify right side
   1,644.72x = 1,210,016.47
5. Step 5: Solve for x
   x = 1,210,016.47/1,644.72
6. Step 6: Final answer
   x = 735.70