Finding the Fourth Proportional to 6,642.93, 9,960.71 and 3,081.16

Step by Step Solution

1. Step 1: Write the proportion equation
   6,642.93 : 9,960.71 = 3,081.16 : x
2. Step 2: Convert to fraction form
   6,642.93/9,960.71 = 3,081.16/x
3. Step 3: Cross multiply
   6,642.93x = 9,960.71 × 3,081.16
4. Step 4: Simplify right side
   6,642.93x = 30,690,538.27
5. Step 5: Solve for x
   x = 30,690,538.27/6,642.93
6. Step 6: Final answer
   x = 4,620.03