Finding the Fourth Proportional to 5,481.50, 7,564.74 and 3,123.78

Step by Step Solution

1. Step 1: Write the proportion equation
   5,481.50 : 7,564.74 = 3,123.78 : x
2. Step 2: Convert to fraction form
   5,481.50/7,564.74 = 3,123.78/x
3. Step 3: Cross multiply
   5,481.50x = 7,564.74 × 3,123.78
4. Step 4: Simplify right side
   5,481.50x = 23,630,583.52
5. Step 5: Solve for x
   x = 23,630,583.52/5,481.50
6. Step 6: Final answer
   x = 4,310.97