Finding the Fourth Proportional to 7,020.56, 10,523.52 and 2,858.90

Step by Step Solution

1. Step 1: Write the proportion equation
   7,020.56 : 10,523.52 = 2,858.90 : x
2. Step 2: Convert to fraction form
   7,020.56/10,523.52 = 2,858.90/x
3. Step 3: Cross multiply
   7,020.56x = 10,523.52 × 2,858.90
4. Step 4: Simplify right side
   7,020.56x = 30,085,691.33
5. Step 5: Solve for x
   x = 30,085,691.33/7,020.56
6. Step 6: Final answer
   x = 4,285.37