Finding the Fourth Proportional to 2,212.96, 3,318.50 and 979.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,212.96 : 3,318.50 = 979.50 : x
2. Step 2: Convert to fraction form
   2,212.96/3,318.50 = 979.50/x
3. Step 3: Cross multiply
   2,212.96x = 3,318.50 × 979.50
4. Step 4: Simplify right side
   2,212.96x = 3,250,470.75
5. Step 5: Solve for x
   x = 3,250,470.75/2,212.96
6. Step 6: Final answer
   x = 1,468.83