Finding the Fourth Proportional to 6,128.56, 9,191.97 and 1,968.03

Step by Step Solution

1. Step 1: Write the proportion equation
   6,128.56 : 9,191.97 = 1,968.03 : x
2. Step 2: Convert to fraction form
   6,128.56/9,191.97 = 1,968.03/x
3. Step 3: Cross multiply
   6,128.56x = 9,191.97 × 1,968.03
4. Step 4: Simplify right side
   6,128.56x = 18,090,072.72
5. Step 5: Solve for x
   x = 18,090,072.72/6,128.56
6. Step 6: Final answer
   x = 2,951.77