Finding the Fourth Proportional to 1,425.82, 1,967.55 and 836.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,425.82 : 1,967.55 = 836.31 : x
2. Step 2: Convert to fraction form
   1,425.82/1,967.55 = 836.31/x
3. Step 3: Cross multiply
   1,425.82x = 1,967.55 × 836.31
4. Step 4: Simplify right side
   1,425.82x = 1,645,481.74
5. Step 5: Solve for x
   x = 1,645,481.74/1,425.82
6. Step 6: Final answer
   x = 1,154.06