Finding the Fourth Proportional to 3,672.39, 5,068.72 and 3,081.90

Step by Step Solution

1. Step 1: Write the proportion equation
   3,672.39 : 5,068.72 = 3,081.90 : x
2. Step 2: Convert to fraction form
   3,672.39/5,068.72 = 3,081.90/x
3. Step 3: Cross multiply
   3,672.39x = 5,068.72 × 3,081.90
4. Step 4: Simplify right side
   3,672.39x = 15,621,262.82
5. Step 5: Solve for x
   x = 15,621,262.82/3,672.39
6. Step 6: Final answer
   x = 4,253.71