Finding the Fourth Proportional to 1,045.79, 1,443.16 and 580.04

Step by Step Solution

1. Step 1: Write the proportion equation
   1,045.79 : 1,443.16 = 580.04 : x
2. Step 2: Convert to fraction form
   1,045.79/1,443.16 = 580.04/x
3. Step 3: Cross multiply
   1,045.79x = 1,443.16 × 580.04
4. Step 4: Simplify right side
   1,045.79x = 837,090.53
5. Step 5: Solve for x
   x = 837,090.53/1,045.79
6. Step 6: Final answer
   x = 800.44