Finding the Fourth Proportional to 2,538.41, 3,808.31 and 872.89

Step by Step Solution

1. Step 1: Write the proportion equation
   2,538.41 : 3,808.31 = 872.89 : x
2. Step 2: Convert to fraction form
   2,538.41/3,808.31 = 872.89/x
3. Step 3: Cross multiply
   2,538.41x = 3,808.31 × 872.89
4. Step 4: Simplify right side
   2,538.41x = 3,324,221.83
5. Step 5: Solve for x
   x = 3,324,221.83/2,538.41
6. Step 6: Final answer
   x = 1,309.57