Finding the Fourth Proportional to 8,499.78, 12,750.48 and 3,306.06

Step by Step Solution

1. Step 1: Write the proportion equation
   8,499.78 : 12,750.48 = 3,306.06 : x
2. Step 2: Convert to fraction form
   8,499.78/12,750.48 = 3,306.06/x
3. Step 3: Cross multiply
   8,499.78x = 12,750.48 × 3,306.06
4. Step 4: Simplify right side
   8,499.78x = 42,153,851.91
5. Step 5: Solve for x
   x = 42,153,851.91/8,499.78
6. Step 6: Final answer
   x = 4,959.41