Finding the Fourth Proportional to 1,789.50, 2,469.78 and 1,091.28

Step by Step Solution

1. Step 1: Write the proportion equation
   1,789.50 : 2,469.78 = 1,091.28 : x
2. Step 2: Convert to fraction form
   1,789.50/2,469.78 = 1,091.28/x
3. Step 3: Cross multiply
   1,789.50x = 2,469.78 × 1,091.28
4. Step 4: Simplify right side
   1,789.50x = 2,695,221.52
5. Step 5: Solve for x
   x = 2,695,221.52/1,789.50
6. Step 6: Final answer
   x = 1,506.13