Finding the Fourth Proportional to 2,132.38, 2,942.67 and 1,188.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,132.38 : 2,942.67 = 1,188.31 : x
2. Step 2: Convert to fraction form
   2,132.38/2,942.67 = 1,188.31/x
3. Step 3: Cross multiply
   2,132.38x = 2,942.67 × 1,188.31
4. Step 4: Simplify right side
   2,132.38x = 3,496,804.19
5. Step 5: Solve for x
   x = 3,496,804.19/2,132.38
6. Step 6: Final answer
   x = 1,639.86