Finding the Fourth Proportional to 1,426.12, 1,967.72 and 836.36

Step by Step Solution

1. Step 1: Write the proportion equation
   1,426.12 : 1,967.72 = 836.36 : x
2. Step 2: Convert to fraction form
   1,426.12/1,967.72 = 836.36/x
3. Step 3: Cross multiply
   1,426.12x = 1,967.72 × 836.36
4. Step 4: Simplify right side
   1,426.12x = 1,645,722.30
5. Step 5: Solve for x
   x = 1,645,722.30/1,426.12
6. Step 6: Final answer
   x = 1,153.99