Finding the Fourth Proportional to 2,636.76, 3,955.50 and 905.52

Step by Step Solution

1. Step 1: Write the proportion equation
   2,636.76 : 3,955.50 = 905.52 : x
2. Step 2: Convert to fraction form
   2,636.76/3,955.50 = 905.52/x
3. Step 3: Cross multiply
   2,636.76x = 3,955.50 × 905.52
4. Step 4: Simplify right side
   2,636.76x = 3,581,784.36
5. Step 5: Solve for x
   x = 3,581,784.36/2,636.76
6. Step 6: Final answer
   x = 1,358.40