Finding the Fourth Proportional to 4,747.68, 7,105.12 and 3,280.57

Step by Step Solution

1. Step 1: Write the proportion equation
   4,747.68 : 7,105.12 = 3,280.57 : x
2. Step 2: Convert to fraction form
   4,747.68/7,105.12 = 3,280.57/x
3. Step 3: Cross multiply
   4,747.68x = 7,105.12 × 3,280.57
4. Step 4: Simplify right side
   4,747.68x = 23,308,817.55
5. Step 5: Solve for x
   x = 23,308,817.55/4,747.68
6. Step 6: Final answer
   x = 4,909.52