Finding the Fourth Proportional to 2,636.20, 3,953.56 and 881.25

Step by Step Solution

1. Step 1: Write the proportion equation
   2,636.20 : 3,953.56 = 881.25 : x
2. Step 2: Convert to fraction form
   2,636.20/3,953.56 = 881.25/x
3. Step 3: Cross multiply
   2,636.20x = 3,953.56 × 881.25
4. Step 4: Simplify right side
   2,636.20x = 3,484,092.73
5. Step 5: Solve for x
   x = 3,484,092.73/2,636.20
6. Step 6: Final answer
   x = 1,321.64