Finding the Fourth Proportional to 1,635.52, 2,256.72 and 936.64

Step by Step Solution

1. Step 1: Write the proportion equation
   1,635.52 : 2,256.72 = 936.64 : x
2. Step 2: Convert to fraction form
   1,635.52/2,256.72 = 936.64/x
3. Step 3: Cross multiply
   1,635.52x = 2,256.72 × 936.64
4. Step 4: Simplify right side
   1,635.52x = 2,113,734.22
5. Step 5: Solve for x
   x = 2,113,734.22/1,635.52
6. Step 6: Final answer
   x = 1,292.39