Finding the Fourth Proportional to 3,387.78, 5,107.07 and 3,162.00

Step by Step Solution

1. Step 1: Write the proportion equation
   3,387.78 : 5,107.07 = 3,162.00 : x
2. Step 2: Convert to fraction form
   3,387.78/5,107.07 = 3,162.00/x
3. Step 3: Cross multiply
   3,387.78x = 5,107.07 × 3,162.00
4. Step 4: Simplify right side
   3,387.78x = 16,148,520.38
5. Step 5: Solve for x
   x = 16,148,520.38/3,387.78
6. Step 6: Final answer
   x = 4,766.69