Finding the Fourth Proportional to 2,385.85, 3,580.16 and 999.06

Step by Step Solution

1. Step 1: Write the proportion equation
   2,385.85 : 3,580.16 = 999.06 : x
2. Step 2: Convert to fraction form
   2,385.85/3,580.16 = 999.06/x
3. Step 3: Cross multiply
   2,385.85x = 3,580.16 × 999.06
4. Step 4: Simplify right side
   2,385.85x = 3,576,794.65
5. Step 5: Solve for x
   x = 3,576,794.65/2,385.85
6. Step 6: Final answer
   x = 1,499.17