Finding the Fourth Proportional to 2,016.32, 3,025.80 and 920.70

Step by Step Solution

1. Step 1: Write the proportion equation
   2,016.32 : 3,025.80 = 920.70 : x
2. Step 2: Convert to fraction form
   2,016.32/3,025.80 = 920.70/x
3. Step 3: Cross multiply
   2,016.32x = 3,025.80 × 920.70
4. Step 4: Simplify right side
   2,016.32x = 2,785,854.06
5. Step 5: Solve for x
   x = 2,785,854.06/2,016.32
6. Step 6: Final answer
   x = 1,381.65