Finding the Fourth Proportional to 2,636.20, 3,953.94 and 904.24

Step by Step Solution

1. Step 1: Write the proportion equation
   2,636.20 : 3,953.94 = 904.24 : x
2. Step 2: Convert to fraction form
   2,636.20/3,953.94 = 904.24/x
3. Step 3: Cross multiply
   2,636.20x = 3,953.94 × 904.24
4. Step 4: Simplify right side
   2,636.20x = 3,575,310.71
5. Step 5: Solve for x
   x = 3,575,310.71/2,636.20
6. Step 6: Final answer
   x = 1,356.24