Finding the Fourth Proportional to 1,045.25, 1,442.50 and 579.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,045.25 : 1,442.50 = 579.50 : x
2. Step 2: Convert to fraction form
   1,045.25/1,442.50 = 579.50/x
3. Step 3: Cross multiply
   1,045.25x = 1,442.50 × 579.50
4. Step 4: Simplify right side
   1,045.25x = 835,925.85
5. Step 5: Solve for x
   x = 835,925.85/1,045.25
6. Step 6: Final answer
   x = 799.74