Finding the Fourth Proportional to 1,976.18, 2,964.43 and 659.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,976.18 : 2,964.43 = 659.89 : x
2. Step 2: Convert to fraction form
   1,976.18/2,964.43 = 659.89/x
3. Step 3: Cross multiply
   1,976.18x = 2,964.43 × 659.89
4. Step 4: Simplify right side
   1,976.18x = 1,956,197.71
5. Step 5: Solve for x
   x = 1,956,197.71/1,976.18
6. Step 6: Final answer
   x = 989.89