Finding the Fourth Proportional to 2,572.29, 3,858.63 and 928.83

Step by Step Solution

1. Step 1: Write the proportion equation
   2,572.29 : 3,858.63 = 928.83 : x
2. Step 2: Convert to fraction form
   2,572.29/3,858.63 = 928.83/x
3. Step 3: Cross multiply
   2,572.29x = 3,858.63 × 928.83
4. Step 4: Simplify right side
   2,572.29x = 3,584,011.30
5. Step 5: Solve for x
   x = 3,584,011.30/2,572.29
6. Step 6: Final answer
   x = 1,393.32