Finding the Fourth Proportional to 2,511.72, 3,767.90 and 867.82

Step by Step Solution

1. Step 1: Write the proportion equation
   2,511.72 : 3,767.90 = 867.82 : x
2. Step 2: Convert to fraction form
   2,511.72/3,767.90 = 867.82/x
3. Step 3: Cross multiply
   2,511.72x = 3,767.90 × 867.82
4. Step 4: Simplify right side
   2,511.72x = 3,269,858.98
5. Step 5: Solve for x
   x = 3,269,858.98/2,511.72
6. Step 6: Final answer
   x = 1,301.84