Finding the Fourth Proportional to 2,635.76, 3,954.15 and 786.85

Step by Step Solution

1. Step 1: Write the proportion equation
   2,635.76 : 3,954.15 = 786.85 : x
2. Step 2: Convert to fraction form
   2,635.76/3,954.15 = 786.85/x
3. Step 3: Cross multiply
   2,635.76x = 3,954.15 × 786.85
4. Step 4: Simplify right side
   2,635.76x = 3,111,313.04
5. Step 5: Solve for x
   x = 3,111,313.04/2,635.76
6. Step 6: Final answer
   x = 1,180.42