Finding the Fourth Proportional to 260,568.23, 359,092.71 and 208,826.55

Step by Step Solution

1. Step 1: Write the proportion equation
   260,568.23 : 359,092.71 = 208,826.55 : x
2. Step 2: Convert to fraction form
   260,568.23/359,092.71 = 208,826.55/x
3. Step 3: Cross multiply
   260,568.23x = 359,092.71 × 208,826.55
4. Step 4: Simplify right side
   260,568.23x = 74,988,091,759.45
5. Step 5: Solve for x
   x = 74,988,091,759.45/260,568.23
6. Step 6: Final answer
   x = 287,786.79