Finding the Fourth Proportional to 2,212.53, 3,053.30 and 1,217.81

Step by Step Solution

1. Step 1: Write the proportion equation
   2,212.53 : 3,053.30 = 1,217.81 : x
2. Step 2: Convert to fraction form
   2,212.53/3,053.30 = 1,217.81/x
3. Step 3: Cross multiply
   2,212.53x = 3,053.30 × 1,217.81
4. Step 4: Simplify right side
   2,212.53x = 3,718,333.18
5. Step 5: Solve for x
   x = 3,718,333.18/2,212.53
6. Step 6: Final answer
   x = 1,680.58