Finding the Fourth Proportional to 1,045.69, 1,443.05 and 579.94

Step by Step Solution

1. Step 1: Write the proportion equation
   1,045.69 : 1,443.05 = 579.94 : x
2. Step 2: Convert to fraction form
   1,045.69/1,443.05 = 579.94/x
3. Step 3: Cross multiply
   1,045.69x = 1,443.05 × 579.94
4. Step 4: Simplify right side
   1,045.69x = 836,878.08
5. Step 5: Solve for x
   x = 836,878.08/1,045.69
6. Step 6: Final answer
   x = 800.31