Finding the Fourth Proportional to 1,045.76, 1,443.15 and 580.01

Step by Step Solution

1. Step 1: Write the proportion equation
   1,045.76 : 1,443.15 = 580.01 : x
2. Step 2: Convert to fraction form
   1,045.76/1,443.15 = 580.01/x
3. Step 3: Cross multiply
   1,045.76x = 1,443.15 × 580.01
4. Step 4: Simplify right side
   1,045.76x = 837,034.22
5. Step 5: Solve for x
   x = 837,034.22/1,045.76
6. Step 6: Final answer
   x = 800.41