Finding the Fourth Proportional to 2,218.32, 3,325.32 and 920.52

Step by Step Solution

1. Step 1: Write the proportion equation
   2,218.32 : 3,325.32 = 920.52 : x
2. Step 2: Convert to fraction form
   2,218.32/3,325.32 = 920.52/x
3. Step 3: Cross multiply
   2,218.32x = 3,325.32 × 920.52
4. Step 4: Simplify right side
   2,218.32x = 3,061,023.57
5. Step 5: Solve for x
   x = 3,061,023.57/2,218.32
6. Step 6: Final answer
   x = 1,379.88