Finding the Fourth Proportional to 2,828.88, 4,245 and 1,185.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,828.88 : 4,245 = 1,185.30 : x
2. Step 2: Convert to fraction form
   2,828.88/4,245 = 1,185.30/x
3. Step 3: Cross multiply
   2,828.88x = 4,245 × 1,185.30
4. Step 4: Simplify right side
   2,828.88x = 5,031,598.50
5. Step 5: Solve for x
   x = 5,031,598.50/2,828.88
6. Step 6: Final answer
   x = 1,778.65