Finding the Fourth Proportional to 2,136.82, 3,205.78 and 1,699.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,136.82 : 3,205.78 = 1,699.72 : x
2. Step 2: Convert to fraction form
   2,136.82/3,205.78 = 1,699.72/x
3. Step 3: Cross multiply
   2,136.82x = 3,205.78 × 1,699.72
4. Step 4: Simplify right side
   2,136.82x = 5,448,928.38
5. Step 5: Solve for x
   x = 5,448,928.38/2,136.82
6. Step 6: Final answer
   x = 2,550.02