Finding the Fourth Proportional to 2,187.78, 3,019.12 and 1,193.06

Step by Step Solution

1. Step 1: Write the proportion equation
   2,187.78 : 3,019.12 = 1,193.06 : x
2. Step 2: Convert to fraction form
   2,187.78/3,019.12 = 1,193.06/x
3. Step 3: Cross multiply
   2,187.78x = 3,019.12 × 1,193.06
4. Step 4: Simplify right side
   2,187.78x = 3,601,995.87
5. Step 5: Solve for x
   x = 3,601,995.87/2,187.78
6. Step 6: Final answer
   x = 1,646.42