Finding the Fourth Proportional to 2,212.62, 3,053.46 and 1,217.94

Step by Step Solution

1. Step 1: Write the proportion equation
   2,212.62 : 3,053.46 = 1,217.94 : x
2. Step 2: Convert to fraction form
   2,212.62/3,053.46 = 1,217.94/x
3. Step 3: Cross multiply
   2,212.62x = 3,053.46 × 1,217.94
4. Step 4: Simplify right side
   2,212.62x = 3,718,917.34
5. Step 5: Solve for x
   x = 3,718,917.34/2,212.62
6. Step 6: Final answer
   x = 1,680.78