Finding the Fourth Proportional to 2,128.39, 3,192.59 and 568.40

Step by Step Solution

1. Step 1: Write the proportion equation
   2,128.39 : 3,192.59 = 568.40 : x
2. Step 2: Convert to fraction form
   2,128.39/3,192.59 = 568.40/x
3. Step 3: Cross multiply
   2,128.39x = 3,192.59 × 568.40
4. Step 4: Simplify right side
   2,128.39x = 1,814,665.31
5. Step 5: Solve for x
   x = 1,814,665.31/2,128.39
6. Step 6: Final answer
   x = 852.60