Finding the Fourth Proportional to 2,665.97, 3,999.50 and 935.81

Step by Step Solution

1. Step 1: Write the proportion equation
   2,665.97 : 3,999.50 = 935.81 : x
2. Step 2: Convert to fraction form
   2,665.97/3,999.50 = 935.81/x
3. Step 3: Cross multiply
   2,665.97x = 3,999.50 × 935.81
4. Step 4: Simplify right side
   2,665.97x = 3,742,772.10
5. Step 5: Solve for x
   x = 3,742,772.10/2,665.97
6. Step 6: Final answer
   x = 1,403.91