Finding the Fourth Proportional to 2,571.87, 3,858.01 and 928.59

Step by Step Solution

1. Step 1: Write the proportion equation
   2,571.87 : 3,858.01 = 928.59 : x
2. Step 2: Convert to fraction form
   2,571.87/3,858.01 = 928.59/x
3. Step 3: Cross multiply
   2,571.87x = 3,858.01 × 928.59
4. Step 4: Simplify right side
   2,571.87x = 3,582,509.51
5. Step 5: Solve for x
   x = 3,582,509.51/2,571.87
6. Step 6: Final answer
   x = 1,392.96