Finding the Fourth Proportional to 11,800.20, 16,284.56 and 7,020.71

Step by Step Solution

1. Step 1: Write the proportion equation
   11,800.20 : 16,284.56 = 7,020.71 : x
2. Step 2: Convert to fraction form
   11,800.20/16,284.56 = 7,020.71/x
3. Step 3: Cross multiply
   11,800.20x = 16,284.56 × 7,020.71
4. Step 4: Simplify right side
   11,800.20x = 114,329,056.71
5. Step 5: Solve for x
   x = 114,329,056.71/11,800.20
6. Step 6: Final answer
   x = 9,688.74