Finding the Fourth Proportional to 9,828.78, 14,745.45 and 2,808.89

Step by Step Solution

1. Step 1: Write the proportion equation
   9,828.78 : 14,745.45 = 2,808.89 : x
2. Step 2: Convert to fraction form
   9,828.78/14,745.45 = 2,808.89/x
3. Step 3: Cross multiply
   9,828.78x = 14,745.45 × 2,808.89
4. Step 4: Simplify right side
   9,828.78x = 41,418,273.32
5. Step 5: Solve for x
   x = 41,418,273.32/9,828.78
6. Step 6: Final answer
   x = 4,213.98