Finding the Fourth Proportional to 1,580.82, 2,371.55 and 485.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,580.82 : 2,371.55 = 485.10 : x
2. Step 2: Convert to fraction form
   1,580.82/2,371.55 = 485.10/x
3. Step 3: Cross multiply
   1,580.82x = 2,371.55 × 485.10
4. Step 4: Simplify right side
   1,580.82x = 1,150,436.48
5. Step 5: Solve for x
   x = 1,150,436.48/1,580.82
6. Step 6: Final answer
   x = 727.75