Finding the Fourth Proportional to 2,152.58, 3,228.78 and 613.58

Step by Step Solution

1. Step 1: Write the proportion equation
   2,152.58 : 3,228.78 = 613.58 : x
2. Step 2: Convert to fraction form
   2,152.58/3,228.78 = 613.58/x
3. Step 3: Cross multiply
   2,152.58x = 3,228.78 × 613.58
4. Step 4: Simplify right side
   2,152.58x = 1,981,098.69
5. Step 5: Solve for x
   x = 1,981,098.69/2,152.58
6. Step 6: Final answer
   x = 920.34