Finding the Fourth Proportional to 1,635.31, 2,256.78 and 936.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,635.31 : 2,256.78 = 936.82 : x
2. Step 2: Convert to fraction form
   1,635.31/2,256.78 = 936.82/x
3. Step 3: Cross multiply
   1,635.31x = 2,256.78 × 936.82
4. Step 4: Simplify right side
   1,635.31x = 2,114,194.51
5. Step 5: Solve for x
   x = 2,114,194.51/1,635.31
6. Step 6: Final answer
   x = 1,292.84