Finding the Fourth Proportional to 7,020.90, 10,522.17 and 2,856.03

Step by Step Solution

1. Step 1: Write the proportion equation
   7,020.90 : 10,522.17 = 2,856.03 : x
2. Step 2: Convert to fraction form
   7,020.90/10,522.17 = 2,856.03/x
3. Step 3: Cross multiply
   7,020.90x = 10,522.17 × 2,856.03
4. Step 4: Simplify right side
   7,020.90x = 30,051,633.19
5. Step 5: Solve for x
   x = 30,051,633.19/7,020.90
6. Step 6: Final answer
   x = 4,280.31