Finding the Fourth Proportional to 2,212.63, 3,053.47 and 1,218.01

Step by Step Solution

1. Step 1: Write the proportion equation
   2,212.63 : 3,053.47 = 1,218.01 : x
2. Step 2: Convert to fraction form
   2,212.63/3,053.47 = 1,218.01/x
3. Step 3: Cross multiply
   2,212.63x = 3,053.47 × 1,218.01
4. Step 4: Simplify right side
   2,212.63x = 3,719,150.90
5. Step 5: Solve for x
   x = 3,719,150.90/2,212.63
6. Step 6: Final answer
   x = 1,680.87