Finding the Fourth Proportional to 2,636.92, 3,955.98 and 905.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,636.92 : 3,955.98 = 905.56 : x
2. Step 2: Convert to fraction form
   2,636.92/3,955.98 = 905.56/x
3. Step 3: Cross multiply
   2,636.92x = 3,955.98 × 905.56
4. Step 4: Simplify right side
   2,636.92x = 3,582,377.25
5. Step 5: Solve for x
   x = 3,582,377.25/2,636.92
6. Step 6: Final answer
   x = 1,358.55