Finding the Fourth Proportional to 1,934.30, 2,668.32 and 1,188.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,934.30 : 2,668.32 = 1,188.42 : x
2. Step 2: Convert to fraction form
   1,934.30/2,668.32 = 1,188.42/x
3. Step 3: Cross multiply
   1,934.30x = 2,668.32 × 1,188.42
4. Step 4: Simplify right side
   1,934.30x = 3,171,084.85
5. Step 5: Solve for x
   x = 3,171,084.85/1,934.30
6. Step 6: Final answer
   x = 1,639.40