Finding the Fourth Proportional to 1,315.25, 1,814.28 and 849.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,315.25 : 1,814.28 = 849.50 : x
2. Step 2: Convert to fraction form
   1,315.25/1,814.28 = 849.50/x
3. Step 3: Cross multiply
   1,315.25x = 1,814.28 × 849.50
4. Step 4: Simplify right side
   1,315.25x = 1,541,225.41
5. Step 5: Solve for x
   x = 1,541,225.41/1,315.25
6. Step 6: Final answer
   x = 1,171.81