Finding the Fourth Proportional to 12,270.78, 18,399.69 and 5,341.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,270.78 : 18,399.69 = 5,341.50 : x
2. Step 2: Convert to fraction form
   12,270.78/18,399.69 = 5,341.50/x
3. Step 3: Cross multiply
   12,270.78x = 18,399.69 × 5,341.50
4. Step 4: Simplify right side
   12,270.78x = 98,281,944.14
5. Step 5: Solve for x
   x = 98,281,944.14/12,270.78
6. Step 6: Final answer
   x = 8,009.43