Finding the Fourth Proportional to 1,302.69, 1,954.59 and 864.09

Step by Step Solution

1. Step 1: Write the proportion equation
   1,302.69 : 1,954.59 = 864.09 : x
2. Step 2: Convert to fraction form
   1,302.69/1,954.59 = 864.09/x
3. Step 3: Cross multiply
   1,302.69x = 1,954.59 × 864.09
4. Step 4: Simplify right side
   1,302.69x = 1,688,945.90
5. Step 5: Solve for x
   x = 1,688,945.90/1,302.69
6. Step 6: Final answer
   x = 1,296.51