Finding the Fourth Proportional to 2,388.78, 3,296.72 and 1,326.62

Step by Step Solution

1. Step 1: Write the proportion equation
   2,388.78 : 3,296.72 = 1,326.62 : x
2. Step 2: Convert to fraction form
   2,388.78/3,296.72 = 1,326.62/x
3. Step 3: Cross multiply
   2,388.78x = 3,296.72 × 1,326.62
4. Step 4: Simplify right side
   2,388.78x = 4,373,471.57
5. Step 5: Solve for x
   x = 4,373,471.57/2,388.78
6. Step 6: Final answer
   x = 1,830.84