Finding the Fourth Proportional to 12,278.16, 16,945.90 and 7,243.61

Step by Step Solution

1. Step 1: Write the proportion equation
   12,278.16 : 16,945.90 = 7,243.61 : x
2. Step 2: Convert to fraction form
   12,278.16/16,945.90 = 7,243.61/x
3. Step 3: Cross multiply
   12,278.16x = 16,945.90 × 7,243.61
4. Step 4: Simplify right side
   12,278.16x = 122,749,533.15
5. Step 5: Solve for x
   x = 122,749,533.15/12,278.16
6. Step 6: Final answer
   x = 9,997.39