Finding the Fourth Proportional to 2,665.20, 3,999.69 and 933.84

Step by Step Solution

1. Step 1: Write the proportion equation
   2,665.20 : 3,999.69 = 933.84 : x
2. Step 2: Convert to fraction form
   2,665.20/3,999.69 = 933.84/x
3. Step 3: Cross multiply
   2,665.20x = 3,999.69 × 933.84
4. Step 4: Simplify right side
   2,665.20x = 3,735,070.51
5. Step 5: Solve for x
   x = 3,735,070.51/2,665.20
6. Step 6: Final answer
   x = 1,401.42