Finding the Fourth Proportional to 5,385.69, 8,081.71 and 2,265.50

Step by Step Solution

1. Step 1: Write the proportion equation
   5,385.69 : 8,081.71 = 2,265.50 : x
2. Step 2: Convert to fraction form
   5,385.69/8,081.71 = 2,265.50/x
3. Step 3: Cross multiply
   5,385.69x = 8,081.71 × 2,265.50
4. Step 4: Simplify right side
   5,385.69x = 18,309,128.55
5. Step 5: Solve for x
   x = 18,309,128.55/5,385.69
6. Step 6: Final answer
   x = 3,399.59