Finding the Fourth Proportional to 2,665.10, 3,999.47 and 933.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,665.10 : 3,999.47 = 933.72 : x
2. Step 2: Convert to fraction form
   2,665.10/3,999.47 = 933.72/x
3. Step 3: Cross multiply
   2,665.10x = 3,999.47 × 933.72
4. Step 4: Simplify right side
   2,665.10x = 3,734,380.46
5. Step 5: Solve for x
   x = 3,734,380.46/2,665.10
6. Step 6: Final answer
   x = 1,401.22