Finding the Fourth Proportional to 2,256.39, 3,384.41 and 613.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,256.39 : 3,384.41 = 613.10 : x
2. Step 2: Convert to fraction form
   2,256.39/3,384.41 = 613.10/x
3. Step 3: Cross multiply
   2,256.39x = 3,384.41 × 613.10
4. Step 4: Simplify right side
   2,256.39x = 2,074,981.77
5. Step 5: Solve for x
   x = 2,074,981.77/2,256.39
6. Step 6: Final answer
   x = 919.60