Finding the Fourth Proportional to 1,046.30, 1,443.88 and 580.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,046.30 : 1,443.88 = 580.55 : x
2. Step 2: Convert to fraction form
   1,046.30/1,443.88 = 580.55/x
3. Step 3: Cross multiply
   1,046.30x = 1,443.88 × 580.55
4. Step 4: Simplify right side
   1,046.30x = 838,244.53
5. Step 5: Solve for x
   x = 838,244.53/1,046.30
6. Step 6: Final answer
   x = 801.15