Finding the Fourth Proportional to 2,212.88, 3,321.37 and 1,118.01

Step by Step Solution

1. Step 1: Write the proportion equation
   2,212.88 : 3,321.37 = 1,118.01 : x
2. Step 2: Convert to fraction form
   2,212.88/3,321.37 = 1,118.01/x
3. Step 3: Cross multiply
   2,212.88x = 3,321.37 × 1,118.01
4. Step 4: Simplify right side
   2,212.88x = 3,713,322.08
5. Step 5: Solve for x
   x = 3,713,322.08/2,212.88
6. Step 6: Final answer
   x = 1,678.05