Finding the Fourth Proportional to 7,280.21, 10,920.27 and 2,086.09

Step by Step Solution

1. Step 1: Write the proportion equation
   7,280.21 : 10,920.27 = 2,086.09 : x
2. Step 2: Convert to fraction form
   7,280.21/10,920.27 = 2,086.09/x
3. Step 3: Cross multiply
   7,280.21x = 10,920.27 × 2,086.09
4. Step 4: Simplify right side
   7,280.21x = 22,780,666.04
5. Step 5: Solve for x
   x = 22,780,666.04/7,280.21
6. Step 6: Final answer
   x = 3,129.12