Finding the Fourth Proportional to 2,880.62, 3,981.39 and 2,539.34

Step by Step Solution

1. Step 1: Write the proportion equation
   2,880.62 : 3,981.39 = 2,539.34 : x
2. Step 2: Convert to fraction form
   2,880.62/3,981.39 = 2,539.34/x
3. Step 3: Cross multiply
   2,880.62x = 3,981.39 × 2,539.34
4. Step 4: Simplify right side
   2,880.62x = 10,110,102.88
5. Step 5: Solve for x
   x = 10,110,102.88/2,880.62
6. Step 6: Final answer
   x = 3,509.70