Finding the Fourth Proportional to 2,539.47, 3,504.56 and 1,420.46

Step by Step Solution

1. Step 1: Write the proportion equation
   2,539.47 : 3,504.56 = 1,420.46 : x
2. Step 2: Convert to fraction form
   2,539.47/3,504.56 = 1,420.46/x
3. Step 3: Cross multiply
   2,539.47x = 3,504.56 × 1,420.46
4. Step 4: Simplify right side
   2,539.47x = 4,978,062.67
5. Step 5: Solve for x
   x = 4,978,062.67/2,539.47
6. Step 6: Final answer
   x = 1,960.28