Finding the Fourth Proportional to 10,853.55, 16,280.15 and 3,457.89

Step by Step Solution

1. Step 1: Write the proportion equation
   10,853.55 : 16,280.15 = 3,457.89 : x
2. Step 2: Convert to fraction form
   10,853.55/16,280.15 = 3,457.89/x
3. Step 3: Cross multiply
   10,853.55x = 16,280.15 × 3,457.89
4. Step 4: Simplify right side
   10,853.55x = 56,294,950.59
5. Step 5: Solve for x
   x = 56,294,950.59/10,853.55
6. Step 6: Final answer
   x = 5,186.78