Finding the Fourth Proportional to 1,789.47, 2,683.53 and 864.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,789.47 : 2,683.53 = 864.72 : x
2. Step 2: Convert to fraction form
   1,789.47/2,683.53 = 864.72/x
3. Step 3: Cross multiply
   1,789.47x = 2,683.53 × 864.72
4. Step 4: Simplify right side
   1,789.47x = 2,320,502.06
5. Step 5: Solve for x
   x = 2,320,502.06/1,789.47
6. Step 6: Final answer
   x = 1,296.75