Finding the Fourth Proportional to 1,443.56, 2,162.52 and 1,213.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,443.56 : 2,162.52 = 1,213.88 : x
2. Step 2: Convert to fraction form
   1,443.56/2,162.52 = 1,213.88/x
3. Step 3: Cross multiply
   1,443.56x = 2,162.52 × 1,213.88
4. Step 4: Simplify right side
   1,443.56x = 2,625,039.78
5. Step 5: Solve for x
   x = 2,625,039.78/1,443.56
6. Step 6: Final answer
   x = 1,818.45