Finding the Fourth Proportional to 2,162.72, 3,239.46 and 928.52

Step by Step Solution

1. Step 1: Write the proportion equation
   2,162.72 : 3,239.46 = 928.52 : x
2. Step 2: Convert to fraction form
   2,162.72/3,239.46 = 928.52/x
3. Step 3: Cross multiply
   2,162.72x = 3,239.46 × 928.52
4. Step 4: Simplify right side
   2,162.72x = 3,007,903.40
5. Step 5: Solve for x
   x = 3,007,903.40/2,162.72
6. Step 6: Final answer
   x = 1,390.80