Finding the Fourth Proportional to 2,636.72, 3,954.39 and 787.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,636.72 : 3,954.39 = 787.42 : x
2. Step 2: Convert to fraction form
   2,636.72/3,954.39 = 787.42/x
3. Step 3: Cross multiply
   2,636.72x = 3,954.39 × 787.42
4. Step 4: Simplify right side
   2,636.72x = 3,113,765.77
5. Step 5: Solve for x
   x = 3,113,765.77/2,636.72
6. Step 6: Final answer
   x = 1,180.92