Finding the Fourth Proportional to 2,187.32, 3,018.24 and 1,243.16

Step by Step Solution

1. Step 1: Write the proportion equation
   2,187.32 : 3,018.24 = 1,243.16 : x
2. Step 2: Convert to fraction form
   2,187.32/3,018.24 = 1,243.16/x
3. Step 3: Cross multiply
   2,187.32x = 3,018.24 × 1,243.16
4. Step 4: Simplify right side
   2,187.32x = 3,752,155.24
5. Step 5: Solve for x
   x = 3,752,155.24/2,187.32
6. Step 6: Final answer
   x = 1,715.41