Finding the Fourth Proportional to 1,100.05, 1,650.17 and 579.71

Step by Step Solution

1. Step 1: Write the proportion equation
   1,100.05 : 1,650.17 = 579.71 : x
2. Step 2: Convert to fraction form
   1,100.05/1,650.17 = 579.71/x
3. Step 3: Cross multiply
   1,100.05x = 1,650.17 × 579.71
4. Step 4: Simplify right side
   1,100.05x = 956,620.05
5. Step 5: Solve for x
   x = 956,620.05/1,100.05
6. Step 6: Final answer
   x = 869.62