Finding the Fourth Proportional to 2,636.72, 3,955.13 and 994.04

Step by Step Solution

1. Step 1: Write the proportion equation
   2,636.72 : 3,955.13 = 994.04 : x
2. Step 2: Convert to fraction form
   2,636.72/3,955.13 = 994.04/x
3. Step 3: Cross multiply
   2,636.72x = 3,955.13 × 994.04
4. Step 4: Simplify right side
   2,636.72x = 3,931,551.24
5. Step 5: Solve for x
   x = 3,931,551.24/2,636.72
6. Step 6: Final answer
   x = 1,491.08