Finding the Fourth Proportional to 2,187.59, 3,279.59 and 1,018.32

Step by Step Solution

1. Step 1: Write the proportion equation
   2,187.59 : 3,279.59 = 1,018.32 : x
2. Step 2: Convert to fraction form
   2,187.59/3,279.59 = 1,018.32/x
3. Step 3: Cross multiply
   2,187.59x = 3,279.59 × 1,018.32
4. Step 4: Simplify right side
   2,187.59x = 3,339,672.09
5. Step 5: Solve for x
   x = 3,339,672.09/2,187.59
6. Step 6: Final answer
   x = 1,526.64