Finding the Fourth Proportional to 12,288.18, 18,416.87 and 5,259.96

Step by Step Solution

1. Step 1: Write the proportion equation
   12,288.18 : 18,416.87 = 5,259.96 : x
2. Step 2: Convert to fraction form
   12,288.18/18,416.87 = 5,259.96/x
3. Step 3: Cross multiply
   12,288.18x = 18,416.87 × 5,259.96
4. Step 4: Simplify right side
   12,288.18x = 96,871,923.89
5. Step 5: Solve for x
   x = 96,871,923.89/12,288.18
6. Step 6: Final answer
   x = 7,883.34