Finding the Fourth Proportional to 1,789.59, 2,685.24 and 864.63

Step by Step Solution

1. Step 1: Write the proportion equation
   1,789.59 : 2,685.24 = 864.63 : x
2. Step 2: Convert to fraction form
   1,789.59/2,685.24 = 864.63/x
3. Step 3: Cross multiply
   1,789.59x = 2,685.24 × 864.63
4. Step 4: Simplify right side
   1,789.59x = 2,321,743.61
5. Step 5: Solve for x
   x = 2,321,743.61/1,789.59
6. Step 6: Final answer
   x = 1,297.36