Finding the Fourth Proportional to 2,379.59, 3,570.41 and 993.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,379.59 : 3,570.41 = 993.20 : x
2. Step 2: Convert to fraction form
   2,379.59/3,570.41 = 993.20/x
3. Step 3: Cross multiply
   2,379.59x = 3,570.41 × 993.20
4. Step 4: Simplify right side
   2,379.59x = 3,546,131.21
5. Step 5: Solve for x
   x = 3,546,131.21/2,379.59
6. Step 6: Final answer
   x = 1,490.23