Finding the Fourth Proportional to 1,045.88, 1,443.30 and 580.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,045.88 : 1,443.30 = 580.12 : x
2. Step 2: Convert to fraction form
   1,045.88/1,443.30 = 580.12/x
3. Step 3: Cross multiply
   1,045.88x = 1,443.30 × 580.12
4. Step 4: Simplify right side
   1,045.88x = 837,287.20
5. Step 5: Solve for x
   x = 837,287.20/1,045.88
6. Step 6: Final answer
   x = 800.56