Finding the Fourth Proportional to 1,004.59, 1,386.18 and 579.19

Step by Step Solution

1. Step 1: Write the proportion equation
   1,004.59 : 1,386.18 = 579.19 : x
2. Step 2: Convert to fraction form
   1,004.59/1,386.18 = 579.19/x
3. Step 3: Cross multiply
   1,004.59x = 1,386.18 × 579.19
4. Step 4: Simplify right side
   1,004.59x = 802,861.59
5. Step 5: Solve for x
   x = 802,861.59/1,004.59
6. Step 6: Final answer
   x = 799.19