Finding the Fourth Proportional to 2,636.69, 3,954.89 and 787.82

Step by Step Solution

1. Step 1: Write the proportion equation
   2,636.69 : 3,954.89 = 787.82 : x
2. Step 2: Convert to fraction form
   2,636.69/3,954.89 = 787.82/x
3. Step 3: Cross multiply
   2,636.69x = 3,954.89 × 787.82
4. Step 4: Simplify right side
   2,636.69x = 3,115,723.63
5. Step 5: Solve for x
   x = 3,115,723.63/2,636.69
6. Step 6: Final answer
   x = 1,181.68