Finding the Fourth Proportional to 1,426.17, 1,967.38 and 836.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,426.17 : 1,967.38 = 836.31 : x
2. Step 2: Convert to fraction form
   1,426.17/1,967.38 = 836.31/x
3. Step 3: Cross multiply
   1,426.17x = 1,967.38 × 836.31
4. Step 4: Simplify right side
   1,426.17x = 1,645,339.57
5. Step 5: Solve for x
   x = 1,645,339.57/1,426.17
6. Step 6: Final answer
   x = 1,153.68