Finding the Fourth Proportional to 3,300.78, 4,959.24 and 2,131.38

Step by Step Solution

1. Step 1: Write the proportion equation
   3,300.78 : 4,959.24 = 2,131.38 : x
2. Step 2: Convert to fraction form
   3,300.78/4,959.24 = 2,131.38/x
3. Step 3: Cross multiply
   3,300.78x = 4,959.24 × 2,131.38
4. Step 4: Simplify right side
   3,300.78x = 10,570,024.95
5. Step 5: Solve for x
   x = 10,570,024.95/3,300.78
6. Step 6: Final answer
   x = 3,202.28