Finding the Fourth Proportional to 1,425.80, 1,967.69 and 836.38

Step by Step Solution

1. Step 1: Write the proportion equation
   1,425.80 : 1,967.69 = 836.38 : x
2. Step 2: Convert to fraction form
   1,425.80/1,967.69 = 836.38/x
3. Step 3: Cross multiply
   1,425.80x = 1,967.69 × 836.38
4. Step 4: Simplify right side
   1,425.80x = 1,645,730.04
5. Step 5: Solve for x
   x = 1,645,730.04/1,425.80
6. Step 6: Final answer
   x = 1,154.25