Finding the Fourth Proportional to 2,945.22, 4,419.45 and 1,215.06

Step by Step Solution

1. Step 1: Write the proportion equation
   2,945.22 : 4,419.45 = 1,215.06 : x
2. Step 2: Convert to fraction form
   2,945.22/4,419.45 = 1,215.06/x
3. Step 3: Cross multiply
   2,945.22x = 4,419.45 × 1,215.06
4. Step 4: Simplify right side
   2,945.22x = 5,369,896.92
5. Step 5: Solve for x
   x = 5,369,896.92/2,945.22
6. Step 6: Final answer
   x = 1,823.26