Finding the Fourth Proportional to 3,462.69, 4,778.91 and 2,136.78

Step by Step Solution

1. Step 1: Write the proportion equation
   3,462.69 : 4,778.91 = 2,136.78 : x
2. Step 2: Convert to fraction form
   3,462.69/4,778.91 = 2,136.78/x
3. Step 3: Cross multiply
   3,462.69x = 4,778.91 × 2,136.78
4. Step 4: Simplify right side
   3,462.69x = 10,211,479.31
5. Step 5: Solve for x
   x = 10,211,479.31/3,462.69
6. Step 6: Final answer
   x = 2,949.00