Finding the Fourth Proportional to 2,665.47, 3,998.75 and 935.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,665.47 : 3,998.75 = 935.31 : x
2. Step 2: Convert to fraction form
   2,665.47/3,998.75 = 935.31/x
3. Step 3: Cross multiply
   2,665.47x = 3,998.75 × 935.31
4. Step 4: Simplify right side
   2,665.47x = 3,740,066.19
5. Step 5: Solve for x
   x = 3,740,066.19/2,665.47
6. Step 6: Final answer
   x = 1,403.15