Finding the Fourth Proportional to 2,212.35, 3,053.01 and 1,217.61

Step by Step Solution

1. Step 1: Write the proportion equation
   2,212.35 : 3,053.01 = 1,217.61 : x
2. Step 2: Convert to fraction form
   2,212.35/3,053.01 = 1,217.61/x
3. Step 3: Cross multiply
   2,212.35x = 3,053.01 × 1,217.61
4. Step 4: Simplify right side
   2,212.35x = 3,717,375.51
5. Step 5: Solve for x
   x = 3,717,375.51/2,212.35
6. Step 6: Final answer
   x = 1,680.28