Finding the Fourth Proportional to 2,544.34, 3,817.35 and 813.22

Step by Step Solution

1. Step 1: Write the proportion equation
   2,544.34 : 3,817.35 = 813.22 : x
2. Step 2: Convert to fraction form
   2,544.34/3,817.35 = 813.22/x
3. Step 3: Cross multiply
   2,544.34x = 3,817.35 × 813.22
4. Step 4: Simplify right side
   2,544.34x = 3,104,345.37
5. Step 5: Solve for x
   x = 3,104,345.37/2,544.34
6. Step 6: Final answer
   x = 1,220.10