Finding the Fourth Proportional to 1,027.45, 1,417.83 and 579.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,027.45 : 1,417.83 = 579.31 : x
2. Step 2: Convert to fraction form
   1,027.45/1,417.83 = 579.31/x
3. Step 3: Cross multiply
   1,027.45x = 1,417.83 × 579.31
4. Step 4: Simplify right side
   1,027.45x = 821,363.10
5. Step 5: Solve for x
   x = 821,363.10/1,027.45
6. Step 6: Final answer
   x = 799.42