Finding the Fourth Proportional to 3,932.94, 5,902.78 and 2,287.20

Step by Step Solution

1. Step 1: Write the proportion equation
   3,932.94 : 5,902.78 = 2,287.20 : x
2. Step 2: Convert to fraction form
   3,932.94/5,902.78 = 2,287.20/x
3. Step 3: Cross multiply
   3,932.94x = 5,902.78 × 2,287.20
4. Step 4: Simplify right side
   3,932.94x = 13,500,838.42
5. Step 5: Solve for x
   x = 13,500,838.42/3,932.94
6. Step 6: Final answer
   x = 3,432.76