Finding the Fourth Proportional to 2,215.46, 3,318.87 and 979.94

Step by Step Solution

1. Step 1: Write the proportion equation
   2,215.46 : 3,318.87 = 979.94 : x
2. Step 2: Convert to fraction form
   2,215.46/3,318.87 = 979.94/x
3. Step 3: Cross multiply
   2,215.46x = 3,318.87 × 979.94
4. Step 4: Simplify right side
   2,215.46x = 3,252,293.47
5. Step 5: Solve for x
   x = 3,252,293.47/2,215.46
6. Step 6: Final answer
   x = 1,468.00