Finding the Fourth Proportional to 1,426.05, 1,967.60 and 836.47

Step by Step Solution

1. Step 1: Write the proportion equation
   1,426.05 : 1,967.60 = 836.47 : x
2. Step 2: Convert to fraction form
   1,426.05/1,967.60 = 836.47/x
3. Step 3: Cross multiply
   1,426.05x = 1,967.60 × 836.47
4. Step 4: Simplify right side
   1,426.05x = 1,645,842.92
5. Step 5: Solve for x
   x = 1,645,842.92/1,426.05
6. Step 6: Final answer
   x = 1,154.13