Finding the Fourth Proportional to 2,020.16, 3,030.72 and 1,860.16

Step by Step Solution

1. Step 1: Write the proportion equation
   2,020.16 : 3,030.72 = 1,860.16 : x
2. Step 2: Convert to fraction form
   2,020.16/3,030.72 = 1,860.16/x
3. Step 3: Cross multiply
   2,020.16x = 3,030.72 × 1,860.16
4. Step 4: Simplify right side
   2,020.16x = 5,637,624.12
5. Step 5: Solve for x
   x = 5,637,624.12/2,020.16
6. Step 6: Final answer
   x = 2,790.68