Finding the Fourth Proportional to 3,401.69, 4,696.09 and 2,643.78

Step by Step Solution

1. Step 1: Write the proportion equation
   3,401.69 : 4,696.09 = 2,643.78 : x
2. Step 2: Convert to fraction form
   3,401.69/4,696.09 = 2,643.78/x
3. Step 3: Cross multiply
   3,401.69x = 4,696.09 × 2,643.78
4. Step 4: Simplify right side
   3,401.69x = 12,415,405.34
5. Step 5: Solve for x
   x = 12,415,405.34/3,401.69
6. Step 6: Final answer
   x = 3,649.78