Finding the Fourth Proportional to 2,132.48, 2,942.78 and 1,188.32

Step by Step Solution

1. Step 1: Write the proportion equation
   2,132.48 : 2,942.78 = 1,188.32 : x
2. Step 2: Convert to fraction form
   2,132.48/2,942.78 = 1,188.32/x
3. Step 3: Cross multiply
   2,132.48x = 2,942.78 × 1,188.32
4. Step 4: Simplify right side
   2,132.48x = 3,496,966.91
5. Step 5: Solve for x
   x = 3,496,966.91/2,132.48
6. Step 6: Final answer
   x = 1,639.86