Finding the Fourth Proportional to 1,980.10, 2,969.52 and 681.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,980.10 : 2,969.52 = 681.25 : x
2. Step 2: Convert to fraction form
   1,980.10/2,969.52 = 681.25/x
3. Step 3: Cross multiply
   1,980.10x = 2,969.52 × 681.25
4. Step 4: Simplify right side
   1,980.10x = 2,022,985.50
5. Step 5: Solve for x
   x = 2,022,985.50/1,980.10
6. Step 6: Final answer
   x = 1,021.66