Finding the Fourth Proportional to 2,635.31, 3,953.67 and 786.43

Step by Step Solution

1. Step 1: Write the proportion equation
   2,635.31 : 3,953.67 = 786.43 : x
2. Step 2: Convert to fraction form
   2,635.31/3,953.67 = 786.43/x
3. Step 3: Cross multiply
   2,635.31x = 3,953.67 × 786.43
4. Step 4: Simplify right side
   2,635.31x = 3,109,284.70
5. Step 5: Solve for x
   x = 3,109,284.70/2,635.31
6. Step 6: Final answer
   x = 1,179.86