Finding the Fourth Proportional to 1,327.50, 1,826.55 and 1,218.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,327.50 : 1,826.55 = 1,218.15 : x
2. Step 2: Convert to fraction form
   1,327.50/1,826.55 = 1,218.15/x
3. Step 3: Cross multiply
   1,327.50x = 1,826.55 × 1,218.15
4. Step 4: Simplify right side
   1,327.50x = 2,225,011.88
5. Step 5: Solve for x
   x = 2,225,011.88/1,327.50
6. Step 6: Final answer
   x = 1,676.09