Finding the Fourth Proportional to 2,386.57, 3,581.25 and 999.79

Step by Step Solution

1. Step 1: Write the proportion equation
   2,386.57 : 3,581.25 = 999.79 : x
2. Step 2: Convert to fraction form
   2,386.57/3,581.25 = 999.79/x
3. Step 3: Cross multiply
   2,386.57x = 3,581.25 × 999.79
4. Step 4: Simplify right side
   2,386.57x = 3,580,475.03
5. Step 5: Solve for x
   x = 3,580,475.03/2,386.57
6. Step 6: Final answer
   x = 1,500.26