Finding the Fourth Proportional to 1,791.89, 2,471.60 and 1,128.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,791.89 : 2,471.60 = 1,128.50 : x
2. Step 2: Convert to fraction form
   1,791.89/2,471.60 = 1,128.50/x
3. Step 3: Cross multiply
   1,791.89x = 2,471.60 × 1,128.50
4. Step 4: Simplify right side
   1,791.89x = 2,789,182.60
5. Step 5: Solve for x
   x = 2,789,182.60/1,791.89
6. Step 6: Final answer
   x = 1,556.56