Finding the Fourth Proportional to 12,280.24, 18,421.55 and 4,883.05

Step by Step Solution

1. Step 1: Write the proportion equation
   12,280.24 : 18,421.55 = 4,883.05 : x
2. Step 2: Convert to fraction form
   12,280.24/18,421.55 = 4,883.05/x
3. Step 3: Cross multiply
   12,280.24x = 18,421.55 × 4,883.05
4. Step 4: Simplify right side
   12,280.24x = 89,953,349.73
5. Step 5: Solve for x
   x = 89,953,349.73/12,280.24
6. Step 6: Final answer
   x = 7,325.05