Finding the Fourth Proportional to 2,858.16, 3,942.50 and 1,961.49

Step by Step Solution

1. Step 1: Write the proportion equation
   2,858.16 : 3,942.50 = 1,961.49 : x
2. Step 2: Convert to fraction form
   2,858.16/3,942.50 = 1,961.49/x
3. Step 3: Cross multiply
   2,858.16x = 3,942.50 × 1,961.49
4. Step 4: Simplify right side
   2,858.16x = 7,733,164.52
5. Step 5: Solve for x
   x = 7,733,164.52/2,858.16
6. Step 6: Final answer
   x = 2,705.64