Finding the Fourth Proportional to 2,212.71, 3,053.57 and 1,217.96

Step by Step Solution

1. Step 1: Write the proportion equation
   2,212.71 : 3,053.57 = 1,217.96 : x
2. Step 2: Convert to fraction form
   2,212.71/3,053.57 = 1,217.96/x
3. Step 3: Cross multiply
   2,212.71x = 3,053.57 × 1,217.96
4. Step 4: Simplify right side
   2,212.71x = 3,719,104.76
5. Step 5: Solve for x
   x = 3,719,104.76/2,212.71
6. Step 6: Final answer
   x = 1,680.79