Finding the Fourth Proportional to 1,045.35, 1,442.52 and 579.60

Step by Step Solution

1. Step 1: Write the proportion equation
   1,045.35 : 1,442.52 = 579.60 : x
2. Step 2: Convert to fraction form
   1,045.35/1,442.52 = 579.60/x
3. Step 3: Cross multiply
   1,045.35x = 1,442.52 × 579.60
4. Step 4: Simplify right side
   1,045.35x = 836,084.59
5. Step 5: Solve for x
   x = 836,084.59/1,045.35
6. Step 6: Final answer
   x = 799.81