Finding the Fourth Proportional to 2,539.67, 3,504.82 and 1,420.59

Step by Step Solution

1. Step 1: Write the proportion equation
   2,539.67 : 3,504.82 = 1,420.59 : x
2. Step 2: Convert to fraction form
   2,539.67/3,504.82 = 1,420.59/x
3. Step 3: Cross multiply
   2,539.67x = 3,504.82 × 1,420.59
4. Step 4: Simplify right side
   2,539.67x = 4,978,908.69
5. Step 5: Solve for x
   x = 4,978,908.69/2,539.67
6. Step 6: Final answer
   x = 1,960.45