Finding the Fourth Proportional to 1,980.36, 2,968.56 and 681.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,980.36 : 2,968.56 = 681.12 : x
2. Step 2: Convert to fraction form
   1,980.36/2,968.56 = 681.12/x
3. Step 3: Cross multiply
   1,980.36x = 2,968.56 × 681.12
4. Step 4: Simplify right side
   1,980.36x = 2,021,945.59
5. Step 5: Solve for x
   x = 2,021,945.59/1,980.36
6. Step 6: Final answer
   x = 1,021.00