Finding the Fourth Proportional to 2,020.16, 3,030.72 and 866.08

Step by Step Solution

1. Step 1: Write the proportion equation
   2,020.16 : 3,030.72 = 866.08 : x
2. Step 2: Convert to fraction form
   2,020.16/3,030.72 = 866.08/x
3. Step 3: Cross multiply
   2,020.16x = 3,030.72 × 866.08
4. Step 4: Simplify right side
   2,020.16x = 2,624,845.98
5. Step 5: Solve for x
   x = 2,624,845.98/2,020.16
6. Step 6: Final answer
   x = 1,299.33