Finding the Fourth Proportional to 2,212.01, 3,052.42 and 1,217.09

Step by Step Solution

1. Step 1: Write the proportion equation
   2,212.01 : 3,052.42 = 1,217.09 : x
2. Step 2: Convert to fraction form
   2,212.01/3,052.42 = 1,217.09/x
3. Step 3: Cross multiply
   2,212.01x = 3,052.42 × 1,217.09
4. Step 4: Simplify right side
   2,212.01x = 3,715,069.86
5. Step 5: Solve for x
   x = 3,715,069.86/2,212.01
6. Step 6: Final answer
   x = 1,679.50