Finding the Fourth Proportional to 2,636.88, 3,951.72 and 903.84

Step by Step Solution

1. Step 1: Write the proportion equation
   2,636.88 : 3,951.72 = 903.84 : x
2. Step 2: Convert to fraction form
   2,636.88/3,951.72 = 903.84/x
3. Step 3: Cross multiply
   2,636.88x = 3,951.72 × 903.84
4. Step 4: Simplify right side
   2,636.88x = 3,571,722.60
5. Step 5: Solve for x
   x = 3,571,722.60/2,636.88
6. Step 6: Final answer
   x = 1,354.53