Finding the Fourth Proportional to 2,402.39, 3,579.70 and 2,140.38

Step by Step Solution

1. Step 1: Write the proportion equation
   2,402.39 : 3,579.70 = 2,140.38 : x
2. Step 2: Convert to fraction form
   2,402.39/3,579.70 = 2,140.38/x
3. Step 3: Cross multiply
   2,402.39x = 3,579.70 × 2,140.38
4. Step 4: Simplify right side
   2,402.39x = 7,661,900.39
5. Step 5: Solve for x
   x = 7,661,900.39/2,402.39
6. Step 6: Final answer
   x = 3,189.29