Finding the Fourth Proportional to 2,187.54, 3,018.72 and 1,243.32

Step by Step Solution

1. Step 1: Write the proportion equation
   2,187.54 : 3,018.72 = 1,243.32 : x
2. Step 2: Convert to fraction form
   2,187.54/3,018.72 = 1,243.32/x
3. Step 3: Cross multiply
   2,187.54x = 3,018.72 × 1,243.32
4. Step 4: Simplify right side
   2,187.54x = 3,753,234.95
5. Step 5: Solve for x
   x = 3,753,234.95/2,187.54
6. Step 6: Final answer
   x = 1,715.73