Finding the Fourth Proportional to 2,016.21, 3,024.67 and 920.69

Step by Step Solution

1. Step 1: Write the proportion equation
   2,016.21 : 3,024.67 = 920.69 : x
2. Step 2: Convert to fraction form
   2,016.21/3,024.67 = 920.69/x
3. Step 3: Cross multiply
   2,016.21x = 3,024.67 × 920.69
4. Step 4: Simplify right side
   2,016.21x = 2,784,769.45
5. Step 5: Solve for x
   x = 2,784,769.45/2,016.21
6. Step 6: Final answer
   x = 1,381.19