Finding the Fourth Proportional to 3,872.47, 5,345.39 and 2,300.57

Step by Step Solution

1. Step 1: Write the proportion equation
   3,872.47 : 5,345.39 = 2,300.57 : x
2. Step 2: Convert to fraction form
   3,872.47/5,345.39 = 2,300.57/x
3. Step 3: Cross multiply
   3,872.47x = 5,345.39 × 2,300.57
4. Step 4: Simplify right side
   3,872.47x = 12,297,443.87
5. Step 5: Solve for x
   x = 12,297,443.87/3,872.47
6. Step 6: Final answer
   x = 3,175.61