Finding the Fourth Proportional to 1,426.07, 1,967.90 and 836.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,426.07 : 1,967.90 = 836.56 : x
2. Step 2: Convert to fraction form
   1,426.07/1,967.90 = 836.56/x
3. Step 3: Cross multiply
   1,426.07x = 1,967.90 × 836.56
4. Step 4: Simplify right side
   1,426.07x = 1,646,262.24
5. Step 5: Solve for x
   x = 1,646,262.24/1,426.07
6. Step 6: Final answer
   x = 1,154.40