Finding the Fourth Proportional to 1,053.30, 1,580.17 and 404.03

Step by Step Solution

1. Step 1: Write the proportion equation
   1,053.30 : 1,580.17 = 404.03 : x
2. Step 2: Convert to fraction form
   1,053.30/1,580.17 = 404.03/x
3. Step 3: Cross multiply
   1,053.30x = 1,580.17 × 404.03
4. Step 4: Simplify right side
   1,053.30x = 638,436.09
5. Step 5: Solve for x
   x = 638,436.09/1,053.30
6. Step 6: Final answer
   x = 606.13