Finding the Fourth Proportional to 1,789.34, 2,684.86 and 864.38

Step by Step Solution

1. Step 1: Write the proportion equation
   1,789.34 : 2,684.86 = 864.38 : x
2. Step 2: Convert to fraction form
   1,789.34/2,684.86 = 864.38/x
3. Step 3: Cross multiply
   1,789.34x = 2,684.86 × 864.38
4. Step 4: Simplify right side
   1,789.34x = 2,320,748.70
5. Step 5: Solve for x
   x = 2,320,748.70/1,789.34
6. Step 6: Final answer
   x = 1,296.98