Finding the Fourth Proportional to 1,682.42, 2,321.72 and 936.36

Step by Step Solution

1. Step 1: Write the proportion equation
   1,682.42 : 2,321.72 = 936.36 : x
2. Step 2: Convert to fraction form
   1,682.42/2,321.72 = 936.36/x
3. Step 3: Cross multiply
   1,682.42x = 2,321.72 × 936.36
4. Step 4: Simplify right side
   1,682.42x = 2,173,966.86
5. Step 5: Solve for x
   x = 2,173,966.86/1,682.42
6. Step 6: Final answer
   x = 1,292.17