Finding the Fourth Proportional to 2,880.84, 3,967.68 and 2,487.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,880.84 : 3,967.68 = 2,487.72 : x
2. Step 2: Convert to fraction form
   2,880.84/3,967.68 = 2,487.72/x
3. Step 3: Cross multiply
   2,880.84x = 3,967.68 × 2,487.72
4. Step 4: Simplify right side
   2,880.84x = 9,870,476.89
5. Step 5: Solve for x
   x = 9,870,476.89/2,880.84
6. Step 6: Final answer
   x = 3,426.25