Finding the Fourth Proportional to 3,546.71, 5,311.86 and 3,423.69

Step by Step Solution

1. Step 1: Write the proportion equation
   3,546.71 : 5,311.86 = 3,423.69 : x
2. Step 2: Convert to fraction form
   3,546.71/5,311.86 = 3,423.69/x
3. Step 3: Cross multiply
   3,546.71x = 5,311.86 × 3,423.69
4. Step 4: Simplify right side
   3,546.71x = 18,186,131.57
5. Step 5: Solve for x
   x = 18,186,131.57/3,546.71
6. Step 6: Final answer
   x = 5,127.61