Finding the Fourth Proportional to 2,368.65, 3,268.59 and 1,320.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,368.65 : 3,268.59 = 1,320.78 : x
2. Step 2: Convert to fraction form
   2,368.65/3,268.59 = 1,320.78/x
3. Step 3: Cross multiply
   2,368.65x = 3,268.59 × 1,320.78
4. Step 4: Simplify right side
   2,368.65x = 4,317,088.30
5. Step 5: Solve for x
   x = 4,317,088.30/2,368.65
6. Step 6: Final answer
   x = 1,822.59