Finding the Fourth Proportional to 2,402.40, 3,270.72 and 2,380.80

Step by Step Solution

1. Step 1: Write the proportion equation
   2,402.40 : 3,270.72 = 2,380.80 : x
2. Step 2: Convert to fraction form
   2,402.40/3,270.72 = 2,380.80/x
3. Step 3: Cross multiply
   2,402.40x = 3,270.72 × 2,380.80
4. Step 4: Simplify right side
   2,402.40x = 7,786,930.18
5. Step 5: Solve for x
   x = 7,786,930.18/2,402.40
6. Step 6: Final answer
   x = 3,241.31