Finding the Fourth Proportional to 6,642.49, 9,960.04 and 3,080.72

Step by Step Solution

1. Step 1: Write the proportion equation
   6,642.49 : 9,960.04 = 3,080.72 : x
2. Step 2: Convert to fraction form
   6,642.49/9,960.04 = 3,080.72/x
3. Step 3: Cross multiply
   6,642.49x = 9,960.04 × 3,080.72
4. Step 4: Simplify right side
   6,642.49x = 30,684,094.43
5. Step 5: Solve for x
   x = 30,684,094.43/6,642.49
6. Step 6: Final answer
   x = 4,619.37