Finding the Fourth Proportional to 10,429.03, 15,640.80 and 3,857.09

Step by Step Solution

1. Step 1: Write the proportion equation
   10,429.03 : 15,640.80 = 3,857.09 : x
2. Step 2: Convert to fraction form
   10,429.03/15,640.80 = 3,857.09/x
3. Step 3: Cross multiply
   10,429.03x = 15,640.80 × 3,857.09
4. Step 4: Simplify right side
   10,429.03x = 60,327,973.27
5. Step 5: Solve for x
   x = 60,327,973.27/10,429.03
6. Step 6: Final answer
   x = 5,784.62