Finding the Fourth Proportional to 3,401.42, 5,091.52 and 2,619.40

Step by Step Solution

1. Step 1: Write the proportion equation
   3,401.42 : 5,091.52 = 2,619.40 : x
2. Step 2: Convert to fraction form
   3,401.42/5,091.52 = 2,619.40/x
3. Step 3: Cross multiply
   3,401.42x = 5,091.52 × 2,619.40
4. Step 4: Simplify right side
   3,401.42x = 13,336,727.49
5. Step 5: Solve for x
   x = 13,336,727.49/3,401.42
6. Step 6: Final answer
   x = 3,920.93