Finding the Fourth Proportional to 2,636.72, 3,953.74 and 881.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,636.72 : 3,953.74 = 881.10 : x
2. Step 2: Convert to fraction form
   2,636.72/3,953.74 = 881.10/x
3. Step 3: Cross multiply
   2,636.72x = 3,953.74 × 881.10
4. Step 4: Simplify right side
   2,636.72x = 3,483,640.31
5. Step 5: Solve for x
   x = 3,483,640.31/2,636.72
6. Step 6: Final answer
   x = 1,321.20