Finding the Fourth Proportional to 1,979.38, 2,968.34 and 680.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,979.38 : 2,968.34 = 680.50 : x
2. Step 2: Convert to fraction form
   1,979.38/2,968.34 = 680.50/x
3. Step 3: Cross multiply
   1,979.38x = 2,968.34 × 680.50
4. Step 4: Simplify right side
   1,979.38x = 2,019,955.37
5. Step 5: Solve for x
   x = 2,019,955.37/1,979.38
6. Step 6: Final answer
   x = 1,020.50