Finding the Fourth Proportional to 3,962.78, 5,469.05 and 2,966.31

Step by Step Solution

1. Step 1: Write the proportion equation
   3,962.78 : 5,469.05 = 2,966.31 : x
2. Step 2: Convert to fraction form
   3,962.78/5,469.05 = 2,966.31/x
3. Step 3: Cross multiply
   3,962.78x = 5,469.05 × 2,966.31
4. Step 4: Simplify right side
   3,962.78x = 16,222,897.71
5. Step 5: Solve for x
   x = 16,222,897.71/3,962.78
6. Step 6: Final answer
   x = 4,093.82