Finding the Fourth Proportional to 2,187.46, 3,018.77 and 1,192.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,187.46 : 3,018.77 = 1,192.78 : x
2. Step 2: Convert to fraction form
   2,187.46/3,018.77 = 1,192.78/x
3. Step 3: Cross multiply
   2,187.46x = 3,018.77 × 1,192.78
4. Step 4: Simplify right side
   2,187.46x = 3,600,728.48
5. Step 5: Solve for x
   x = 3,600,728.48/2,187.46
6. Step 6: Final answer
   x = 1,646.08