Finding the Fourth Proportional to 12,276.18, 18,409.38 and 5,259.54

Step by Step Solution

1. Step 1: Write the proportion equation
   12,276.18 : 18,409.38 = 5,259.54 : x
2. Step 2: Convert to fraction form
   12,276.18/18,409.38 = 5,259.54/x
3. Step 3: Cross multiply
   12,276.18x = 18,409.38 × 5,259.54
4. Step 4: Simplify right side
   12,276.18x = 96,824,870.49
5. Step 5: Solve for x
   x = 96,824,870.49/12,276.18
6. Step 6: Final answer
   x = 7,887.21