Finding the Fourth Proportional to 1,335.69, 2,004.72 and 1,189.21

Step by Step Solution

1. Step 1: Write the proportion equation
   1,335.69 : 2,004.72 = 1,189.21 : x
2. Step 2: Convert to fraction form
   1,335.69/2,004.72 = 1,189.21/x
3. Step 3: Cross multiply
   1,335.69x = 2,004.72 × 1,189.21
4. Step 4: Simplify right side
   1,335.69x = 2,384,033.07
5. Step 5: Solve for x
   x = 2,384,033.07/1,335.69
6. Step 6: Final answer
   x = 1,784.87