Finding the Fourth Proportional to 2,636.30, 3,954.49 and 786.98

Step by Step Solution

1. Step 1: Write the proportion equation
   2,636.30 : 3,954.49 = 786.98 : x
2. Step 2: Convert to fraction form
   2,636.30/3,954.49 = 786.98/x
3. Step 3: Cross multiply
   2,636.30x = 3,954.49 × 786.98
4. Step 4: Simplify right side
   2,636.30x = 3,112,112.46
5. Step 5: Solve for x
   x = 3,112,112.46/2,636.30
6. Step 6: Final answer
   x = 1,180.48