Finding the Fourth Proportional to 1,344.56, 1,855.50 and 813.46

Step by Step Solution

1. Step 1: Write the proportion equation
   1,344.56 : 1,855.50 = 813.46 : x
2. Step 2: Convert to fraction form
   1,344.56/1,855.50 = 813.46/x
3. Step 3: Cross multiply
   1,344.56x = 1,855.50 × 813.46
4. Step 4: Simplify right side
   1,344.56x = 1,509,375.03
5. Step 5: Solve for x
   x = 1,509,375.03/1,344.56
6. Step 6: Final answer
   x = 1,122.58