Finding the Fourth Proportional to 6,510.77, 9,767.37 and 2,128.47

Step by Step Solution

1. Step 1: Write the proportion equation
   6,510.77 : 9,767.37 = 2,128.47 : x
2. Step 2: Convert to fraction form
   6,510.77/9,767.37 = 2,128.47/x
3. Step 3: Cross multiply
   6,510.77x = 9,767.37 × 2,128.47
4. Step 4: Simplify right side
   6,510.77x = 20,789,562.01
5. Step 5: Solve for x
   x = 20,789,562.01/6,510.77
6. Step 6: Final answer
   x = 3,193.10