Finding the Fourth Proportional to 2,134.78, 2,945.89 and 1,190.67

Step by Step Solution

1. Step 1: Write the proportion equation
   2,134.78 : 2,945.89 = 1,190.67 : x
2. Step 2: Convert to fraction form
   2,134.78/2,945.89 = 1,190.67/x
3. Step 3: Cross multiply
   2,134.78x = 2,945.89 × 1,190.67
4. Step 4: Simplify right side
   2,134.78x = 3,507,582.85
5. Step 5: Solve for x
   x = 3,507,582.85/2,134.78
6. Step 6: Final answer
   x = 1,643.07