Finding the Fourth Proportional to 2,635.39, 3,953.68 and 786.43

Step by Step Solution

1. Step 1: Write the proportion equation
   2,635.39 : 3,953.68 = 786.43 : x
2. Step 2: Convert to fraction form
   2,635.39/3,953.68 = 786.43/x
3. Step 3: Cross multiply
   2,635.39x = 3,953.68 × 786.43
4. Step 4: Simplify right side
   2,635.39x = 3,109,295.54
5. Step 5: Solve for x
   x = 3,109,295.54/2,635.39
6. Step 6: Final answer
   x = 1,179.83