Finding the Fourth Proportional to 1,977.85, 2,967.23 and 679.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,977.85 : 2,967.23 = 679.31 : x
2. Step 2: Convert to fraction form
   1,977.85/2,967.23 = 679.31/x
3. Step 3: Cross multiply
   1,977.85x = 2,967.23 × 679.31
4. Step 4: Simplify right side
   1,977.85x = 2,015,673.03
5. Step 5: Solve for x
   x = 2,015,673.03/1,977.85
6. Step 6: Final answer
   x = 1,019.12