Finding the Fourth Proportional to 2,215.98, 3,321.06 and 1,119.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,215.98 : 3,321.06 = 1,119.72 : x
2. Step 2: Convert to fraction form
   2,215.98/3,321.06 = 1,119.72/x
3. Step 3: Cross multiply
   2,215.98x = 3,321.06 × 1,119.72
4. Step 4: Simplify right side
   2,215.98x = 3,718,657.30
5. Step 5: Solve for x
   x = 3,718,657.30/2,215.98
6. Step 6: Final answer
   x = 1,678.11