Finding the Fourth Proportional to 2,539.92, 3,504.72 and 1,420.83

Step by Step Solution

1. Step 1: Write the proportion equation
   2,539.92 : 3,504.72 = 1,420.83 : x
2. Step 2: Convert to fraction form
   2,539.92/3,504.72 = 1,420.83/x
3. Step 3: Cross multiply
   2,539.92x = 3,504.72 × 1,420.83
4. Step 4: Simplify right side
   2,539.92x = 4,979,611.32
5. Step 5: Solve for x
   x = 4,979,611.32/2,539.92
6. Step 6: Final answer
   x = 1,960.54