Finding the Fourth Proportional to 1,395.91, 1,926.72 and 836.74

Step by Step Solution

1. Step 1: Write the proportion equation
   1,395.91 : 1,926.72 = 836.74 : x
2. Step 2: Convert to fraction form
   1,395.91/1,926.72 = 836.74/x
3. Step 3: Cross multiply
   1,395.91x = 1,926.72 × 836.74
4. Step 4: Simplify right side
   1,395.91x = 1,612,163.69
5. Step 5: Solve for x
   x = 1,612,163.69/1,395.91
6. Step 6: Final answer
   x = 1,154.92