Finding the Fourth Proportional to 1,384.39, 2,077.25 and 864.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,384.39 : 2,077.25 = 864.25 : x
2. Step 2: Convert to fraction form
   1,384.39/2,077.25 = 864.25/x
3. Step 3: Cross multiply
   1,384.39x = 2,077.25 × 864.25
4. Step 4: Simplify right side
   1,384.39x = 1,795,263.31
5. Step 5: Solve for x
   x = 1,795,263.31/1,384.39
6. Step 6: Final answer
   x = 1,296.79