Finding the Fourth Proportional to 10,613.43, 15,917.54 and 3,857.91

Step by Step Solution

1. Step 1: Write the proportion equation
   10,613.43 : 15,917.54 = 3,857.91 : x
2. Step 2: Convert to fraction form
   10,613.43/15,917.54 = 3,857.91/x
3. Step 3: Cross multiply
   10,613.43x = 15,917.54 × 3,857.91
4. Step 4: Simplify right side
   10,613.43x = 61,408,436.74
5. Step 5: Solve for x
   x = 61,408,436.74/10,613.43
6. Step 6: Final answer
   x = 5,785.92