Finding the Fourth Proportional to 1,979.37, 2,969.42 and 680.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,979.37 : 2,969.42 = 680.52 : x
2. Step 2: Convert to fraction form
   1,979.37/2,969.42 = 680.52/x
3. Step 3: Cross multiply
   1,979.37x = 2,969.42 × 680.52
4. Step 4: Simplify right side
   1,979.37x = 2,020,746.30
5. Step 5: Solve for x
   x = 2,020,746.30/1,979.37
6. Step 6: Final answer
   x = 1,020.90