Finding the Fourth Proportional to 3,419.55, 4,718.25 and 2,890.62

Step by Step Solution

1. Step 1: Write the proportion equation
   3,419.55 : 4,718.25 = 2,890.62 : x
2. Step 2: Convert to fraction form
   3,419.55/4,718.25 = 2,890.62/x
3. Step 3: Cross multiply
   3,419.55x = 4,718.25 × 2,890.62
4. Step 4: Simplify right side
   3,419.55x = 13,638,667.82
5. Step 5: Solve for x
   x = 13,638,667.82/3,419.55
6. Step 6: Final answer
   x = 3,988.44