Finding the Fourth Proportional to 2,572.34, 3,857.52 and 928.46

Step by Step Solution

1. Step 1: Write the proportion equation
   2,572.34 : 3,857.52 = 928.46 : x
2. Step 2: Convert to fraction form
   2,572.34/3,857.52 = 928.46/x
3. Step 3: Cross multiply
   2,572.34x = 3,857.52 × 928.46
4. Step 4: Simplify right side
   2,572.34x = 3,581,553.02
5. Step 5: Solve for x
   x = 3,581,553.02/2,572.34
6. Step 6: Final answer
   x = 1,392.33