Finding the Fourth Proportional to 2,152.73, 3,228.13 and 613.37

Step by Step Solution

1. Step 1: Write the proportion equation
   2,152.73 : 3,228.13 = 613.37 : x
2. Step 2: Convert to fraction form
   2,152.73/3,228.13 = 613.37/x
3. Step 3: Cross multiply
   2,152.73x = 3,228.13 × 613.37
4. Step 4: Simplify right side
   2,152.73x = 1,980,018.89
5. Step 5: Solve for x
   x = 1,980,018.89/2,152.73
6. Step 6: Final answer
   x = 919.77