Finding the Fourth Proportional to 5,280.50, 7,921.56 and 3,830.60

Step by Step Solution

1. Step 1: Write the proportion equation
   5,280.50 : 7,921.56 = 3,830.60 : x
2. Step 2: Convert to fraction form
   5,280.50/7,921.56 = 3,830.60/x
3. Step 3: Cross multiply
   5,280.50x = 7,921.56 × 3,830.60
4. Step 4: Simplify right side
   5,280.50x = 30,344,327.74
5. Step 5: Solve for x
   x = 30,344,327.74/5,280.50
6. Step 6: Final answer
   x = 5,746.49