Finding the Fourth Proportional to 1,045.60, 1,442.72 and 579.76

Step by Step Solution

1. Step 1: Write the proportion equation
   1,045.60 : 1,442.72 = 579.76 : x
2. Step 2: Convert to fraction form
   1,045.60/1,442.72 = 579.76/x
3. Step 3: Cross multiply
   1,045.60x = 1,442.72 × 579.76
4. Step 4: Simplify right side
   1,045.60x = 836,431.35
5. Step 5: Solve for x
   x = 836,431.35/1,045.60
6. Step 6: Final answer
   x = 799.95