Finding the Fourth Proportional to 2,665.33, 3,996.60 and 1,277.80

Step by Step Solution

1. Step 1: Write the proportion equation
   2,665.33 : 3,996.60 = 1,277.80 : x
2. Step 2: Convert to fraction form
   2,665.33/3,996.60 = 1,277.80/x
3. Step 3: Cross multiply
   2,665.33x = 3,996.60 × 1,277.80
4. Step 4: Simplify right side
   2,665.33x = 5,106,855.48
5. Step 5: Solve for x
   x = 5,106,855.48/2,665.33
6. Step 6: Final answer
   x = 1,916.03