Finding the Fourth Proportional to 2,636.24, 3,954.34 and 787.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,636.24 : 3,954.34 = 787.30 : x
2. Step 2: Convert to fraction form
   2,636.24/3,954.34 = 787.30/x
3. Step 3: Cross multiply
   2,636.24x = 3,954.34 × 787.30
4. Step 4: Simplify right side
   2,636.24x = 3,113,240.03
5. Step 5: Solve for x
   x = 3,113,240.03/2,636.24
6. Step 6: Final answer
   x = 1,180.94