Finding the Fourth Proportional to 1,045.85, 1,443.27 and 580.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,045.85 : 1,443.27 = 580.10 : x
2. Step 2: Convert to fraction form
   1,045.85/1,443.27 = 580.10/x
3. Step 3: Cross multiply
   1,045.85x = 1,443.27 × 580.10
4. Step 4: Simplify right side
   1,045.85x = 837,233.71
5. Step 5: Solve for x
   x = 837,233.71/1,045.85
6. Step 6: Final answer
   x = 800.53