Finding the Fourth Proportional to 8,280.30, 12,432.59 and 5,173.54

Step by Step Solution

1. Step 1: Write the proportion equation
   8,280.30 : 12,432.59 = 5,173.54 : x
2. Step 2: Convert to fraction form
   8,280.30/12,432.59 = 5,173.54/x
3. Step 3: Cross multiply
   8,280.30x = 12,432.59 × 5,173.54
4. Step 4: Simplify right side
   8,280.30x = 64,320,501.67
5. Step 5: Solve for x
   x = 64,320,501.67/8,280.30
6. Step 6: Final answer
   x = 7,767.90