Finding the Fourth Proportional to 2,636.57, 3,952.38 and 903.98

Step by Step Solution

1. Step 1: Write the proportion equation
   2,636.57 : 3,952.38 = 903.98 : x
2. Step 2: Convert to fraction form
   2,636.57/3,952.38 = 903.98/x
3. Step 3: Cross multiply
   2,636.57x = 3,952.38 × 903.98
4. Step 4: Simplify right side
   2,636.57x = 3,572,885.74
5. Step 5: Solve for x
   x = 3,572,885.74/2,636.57
6. Step 6: Final answer
   x = 1,355.13