Finding the Fourth Proportional to 10,861.17, 16,291.89 and 3,465.60

Step by Step Solution

1. Step 1: Write the proportion equation
   10,861.17 : 16,291.89 = 3,465.60 : x
2. Step 2: Convert to fraction form
   10,861.17/16,291.89 = 3,465.60/x
3. Step 3: Cross multiply
   10,861.17x = 16,291.89 × 3,465.60
4. Step 4: Simplify right side
   10,861.17x = 56,461,173.98
5. Step 5: Solve for x
   x = 56,461,173.98/10,861.17
6. Step 6: Final answer
   x = 5,198.44