Finding the Fourth Proportional to 3,928.78, 5,886.24 and 2,075.82

Step by Step Solution

1. Step 1: Write the proportion equation
   3,928.78 : 5,886.24 = 2,075.82 : x
2. Step 2: Convert to fraction form
   3,928.78/5,886.24 = 2,075.82/x
3. Step 3: Cross multiply
   3,928.78x = 5,886.24 × 2,075.82
4. Step 4: Simplify right side
   3,928.78x = 12,218,774.72
5. Step 5: Solve for x
   x = 12,218,774.72/3,928.78
6. Step 6: Final answer
   x = 3,110.07