Finding the Fourth Proportional to 1,934.69, 2,669.92 and 1,188.23

Step by Step Solution

1. Step 1: Write the proportion equation
   1,934.69 : 2,669.92 = 1,188.23 : x
2. Step 2: Convert to fraction form
   1,934.69/2,669.92 = 1,188.23/x
3. Step 3: Cross multiply
   1,934.69x = 2,669.92 × 1,188.23
4. Step 4: Simplify right side
   1,934.69x = 3,172,462.72
5. Step 5: Solve for x
   x = 3,172,462.72/1,934.69
6. Step 6: Final answer
   x = 1,639.78