Finding the Fourth Proportional to 4,081.29, 6,120.72 and 1,307.49

Step by Step Solution

1. Step 1: Write the proportion equation
   4,081.29 : 6,120.72 = 1,307.49 : x
2. Step 2: Convert to fraction form
   4,081.29/6,120.72 = 1,307.49/x
3. Step 3: Cross multiply
   4,081.29x = 6,120.72 × 1,307.49
4. Step 4: Simplify right side
   4,081.29x = 8,002,780.19
5. Step 5: Solve for x
   x = 8,002,780.19/4,081.29
6. Step 6: Final answer
   x = 1,960.85