Finding the Fourth Proportional to 2,196.82, 3,029.75 and 1,978.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,196.82 : 3,029.75 = 1,978.12 : x
2. Step 2: Convert to fraction form
   2,196.82/3,029.75 = 1,978.12/x
3. Step 3: Cross multiply
   2,196.82x = 3,029.75 × 1,978.12
4. Step 4: Simplify right side
   2,196.82x = 5,993,221.51
5. Step 5: Solve for x
   x = 5,993,221.51/2,196.82
6. Step 6: Final answer
   x = 2,728.13