Finding the Fourth Proportional to 1,045.05, 1,442.16 and 579.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,045.05 : 1,442.16 = 579.30 : x
2. Step 2: Convert to fraction form
   1,045.05/1,442.16 = 579.30/x
3. Step 3: Cross multiply
   1,045.05x = 1,442.16 × 579.30
4. Step 4: Simplify right side
   1,045.05x = 835,443.29
5. Step 5: Solve for x
   x = 835,443.29/1,045.05
6. Step 6: Final answer
   x = 799.43