Finding the Fourth Proportional to 5,196.78, 7,171.67 and 3,100.50

Step by Step Solution

1. Step 1: Write the proportion equation
   5,196.78 : 7,171.67 = 3,100.50 : x
2. Step 2: Convert to fraction form
   5,196.78/7,171.67 = 3,100.50/x
3. Step 3: Cross multiply
   5,196.78x = 7,171.67 × 3,100.50
4. Step 4: Simplify right side
   5,196.78x = 22,235,770.59
5. Step 5: Solve for x
   x = 22,235,770.59/5,196.78
6. Step 6: Final answer
   x = 4,278.76