Finding the Fourth Proportional to 2,780.78, 3,828.72 and 2,360.26

Step by Step Solution

1. Step 1: Write the proportion equation
   2,780.78 : 3,828.72 = 2,360.26 : x
2. Step 2: Convert to fraction form
   2,780.78/3,828.72 = 2,360.26/x
3. Step 3: Cross multiply
   2,780.78x = 3,828.72 × 2,360.26
4. Step 4: Simplify right side
   2,780.78x = 9,036,774.67
5. Step 5: Solve for x
   x = 9,036,774.67/2,780.78
6. Step 6: Final answer
   x = 3,249.73