Finding the Fourth Proportional to 10,860.29, 16,290.15 and 3,465.20

Step by Step Solution

1. Step 1: Write the proportion equation
   10,860.29 : 16,290.15 = 3,465.20 : x
2. Step 2: Convert to fraction form
   10,860.29/16,290.15 = 3,465.20/x
3. Step 3: Cross multiply
   10,860.29x = 16,290.15 × 3,465.20
4. Step 4: Simplify right side
   10,860.29x = 56,448,627.78
5. Step 5: Solve for x
   x = 56,448,627.78/10,860.29
6. Step 6: Final answer
   x = 5,197.71